Start with a compact solo microwave if reheating mashed potatoes and other leftovers is the main job: check that it fits your worktop with the required ventilation space and that your usual bowl can rotate inside. A grill is worth considering if you will also use it for browning; a larger inverter model makes more sense for frequent, larger portions only if you can accommodate its footprint. Compare manual power settings and the exact model instructions rather than assuming that capacity alone settles the choice.
If mash, leftovers and occasional ready meals are your main uses, measure the available width and depth before comparing cooking programmes. The compact models described by Panasonic, Russell Hobbs and Morphy Richards have different exterior dimensions, and each still needs the placement space specified in its manual.
If you use a particular serving bowl or dinner plate, its ability to rotate matters more than a capacity label alone. Panasonic, Russell Hobbs and Morphy Richards list turntables of 24.5–25.5 cm on the cited compact models; measure your own microwave-safe dish and allow clearance around it.
If a wider dish is a frequent requirement, a larger turntable may justify giving up more counter space. Panasonic lists a 285 mm turntable on its 23 L NN-SD27HSBPQ, alongside a 395 mm exterior depth. Panasonic's statements about even heating on that inverter model are manufacturer claims, not a comparison with the compact alternatives.
For reheating mash, establish worktop and dish fit before deciding whether extra cooking functions or a larger cavity would serve another regular need.
Choose when: Reheating mash, leftovers and individual meals is the main job and worktop space is limited.
Trade-off: A solo microwave does not add a grill for browning food.
Choose when: You will use the appliance for browning as well as reheating.
Trade-off: The grill adds a function to learn but is unnecessary for reheating mash alone.
Choose when: Larger portions or wider cookware regularly make a bigger turntable useful.
Trade-off: Panasonic's 23 L NN-SD27HSBPQ is 395 mm deep; its even-heating description is Panasonic's own claim, not an independent performance result.
| Concern | What to check | Who this matters to |
|---|---|---|
| Worktop and installation fit | Measure available width, depth and height against the exterior dimensions and the exact model's ventilation instructions. Check socket location and cable reach. | If the worktop is already crowded, I need room for the microwave without losing the space I use to prepare food. Around 36% of consumers would put worktop and installation fit first. |
| Bowl, plate and portion fit | Compare your usual microwave-safe dish with the turntable diameter and check that it can rotate with clearance; litres alone cannot establish dish fit. | When I reheat mash in my usual bowl, it needs to turn without catching against the cavity. For around 29% of consumers, dish and portion fit is the primary concern. |
| Reheating control | Look for manual power settings and timing controls that let you pause, stir and check the food. | I want to adjust a reheating session rather than rely on a preset for every portion. Reheating control comes first for around 21% of consumers. |
| Controls and cleaning | Compare the control layout and check whether the turntable can be removed for cleaning; follow the model's cleaning instructions. | If I use the microwave often, I want controls I understand and a straightforward way to deal with splashes. Around 14% of consumers would prioritise everyday operation and cleaning. |
Capacity does not tell you whether a microwave is too deep for your counter or whether your usual bowl will rotate inside it. The cited 20 L models have different exterior sizes and turntables.
Measure the worktop and dish, then compare exterior dimensions, turntable diameter and the model's required installation space.
A grill or combination function serves a different cooking task from reheating mashed potatoes. It does not replace checks on fit, dish clearance or reheating controls.
Start with a solo model if reheating is the main use; consider a grill only if browning is also part of your cooking routine.
Electrical Safety First warns that a countertop microwave is a high-power heating appliance and that an extension lead may be overloaded.
Plan its position around a suitable wall socket, confirm the UK plug and cable reach, and follow the manufacturer's placement instructions.
Microwaves are electrical equipment covered by the UK waste electrical and electronic equipment framework. Collection arrangements depend on the local authority; Coventry City Council, for example, directs residents to electrical recycling or its collection service rather than household bins.
Check your council's current electrical-recycling or bulky-waste arrangements before replacing the appliance.
These model-specific examples show why footprint, turntable size and functions need checking separately; a brand name alone does not settle the choice.
Panasonic UK & Ireland lists both a compact 20 L grill microwave and a larger 23 L inverter solo model.
Russell Hobbs lists the RHM2076B as a 20 L digital solo microwave with a 25.5 cm turntable.
Toshiba Lifestyle UK describes the MV-AM20T as a 20 L solo microwave with five power levels and 12 presets.
Morphy Richards lists a 20 L, 800 W digital microwave with an 24.5 cm glass turntable.
These solo microwaves offer compact 20 L choices alongside larger 23 L and 25 L options for consumers who need more room for a dish. Check each model against your available worktop and usual bowl before choosing.
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A solo option to consider when reheating is the main task and you are looking at 20 L models. Its title specifies five power levels; check that your usual bowl rotates inside and follow the model's placement instructions. Confirm the UK plug and fuse before use.
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Consider this larger solo model if a compact 20 L option does not meet your dish needs and you have space for a bigger appliance. The title includes auto defrost; measure the available worktop and check dish rotation, ventilation requirements and the UK plug and fuse before buying.
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This 20 L solo model is another option for reheating in a small kitchen if its dimensions suit your worktop. Its name identifies MET Inverter Technology, but do not assume a particular reheating result from that feature alone. Check the actual turntable against your bowl, confirm the control and timer variant, and check placement instructions and the UK plug and fuse.
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This 23 L solo model is worth comparing when your usual dish calls for more room than a compact option offers. Its title includes auto defrost, but the control type needs checking for the exact variant. Measure your worktop, confirm bowl clearance and follow the model's ventilation instructions; check the UK plug and fuse too.
No: a solo microwave with a suitable dish fit and adjustable settings covers the reheating task. Consider a grill if you will separately use it to brown food; Panasonic's NN-GT23QMBPQ is an example of a compact model with that additional function.
A 20 L label cannot tell you whether a particular bowl will fit and rotate. Measure your microwave-safe dish, compare it with the turntable diameter and allow clearance; the cited compact models from Panasonic, Russell Hobbs and Morphy Richards have turntables ranging from 24.5 to 25.5 cm.
Check for a UK 3-pin plug with a fuse and position the microwave according to its manufacturer's instructions. Electrical Safety First warns that an extension lead may be overloaded by a high-power appliance such as a microwave, so check that the cable reaches a suitable wall socket.
For baby food, the NHS advises reheating until it is steaming hot throughout, stirring well after microwave heating to remove hot pockets, then cooling and checking the temperature before feeding. Its advice also says to reheat already-cooked food for a child only once.
Use an appropriate electrical-recycling or collection route rather than treating the microwave as ordinary household rubbish. UK government guidance places electrical equipment within the WEEE framework; check your council's current arrangements, as local services differ.