In some parts of the country, the more southerly and sheltered gardens, February is the right time to prepare the veg plot by warming up the soil ready for early plantings. This can be done either by covering with polythene, (well pegged down to be secure in the event of gales) or with cloches. If this is too much faff just wait a month or so and nature should do the warming for you.
If you are a keen gardener and in a sheltered spot, it is possible to start some veg growing but only a few and specific named varieties. Only plant during a mild spell and protect with cloches. There are some very hardy Broad beans, such as Aquadulce Claudia. Also, Garlic can be planted now in sheltered areas with light soil. Some garlic is suitable for autumn planting and some for spring so you need to check the variety and also there is soft neck and hard neck. Garlic is easy to grow and can even be grown in between other veg, and in pots. Importantly Garlic needs a light soil and lots of sun.
You can germinate under glass hardier varieties of Peas, Beetroot, the Bolthardy variety would be suitable, radishes, some lettuces can be started in the green house, such as the cut and come again varieties which includes rocket. You can also propagate (with heat,) leeks, cabbages, Brussels and chilies which need a long growing season. Remember, once germinated the seedlings will need to continue growing under glass or frost free until all risk of frost has passed. If space is a problem, it's sometimes easier to germinate later when the weather is better. Broad beans can be sown indoors into root trainers or cardboard tubes to give them a long root run.
Take the old brown foliage off strawberries to encourage new growth and to let in more light. To get an early crop of Strawberries cloche them later this month/early March but remember to water under the cloches periodically.
February is also the time to chit potatoes ready for planting out in the spring. Place them in a cool and light area and from the "eyes" shoots will form over the next few weeks until planting out. This is said to help get the potatoes off to a good start, don't worry if there is not time to do this before planting the jury is out on how much good chitting actually does.
High levels of blight have been a problem during the past few wet summers. It's hard to avoid but there are varieties of potato which are blight resistant, such as the Sarpo varieties. Another possibility is to grow early cropping potatoes such as Charlotte, Pink Fir, Rocket, Anya (all sold in garden centres and on line) which may crop before the blight arrives. If you have grown potatoes in containers, it is worth scrubbing them out with disinfectant to eradicate any remnants of blight. It is best not to reuse compost which has had blighted potatoes grown in it. Also to reduce pests and disease, rotate the crop so the potatoes, and all veg, are not grown in the same part of the veg plot on consecutive years.