Posted: 10/02/2014 at 18:00
Sungold are a really good variety for salad/fresh use ....easy to grow inside or out. The larger plum types such as Roma are good for sauces and freezing. As a medium size for fresh or cooking, Black Cherry are a good bet........slightly later than sungold but a good flavour. All can be indoor or out and if you are in London, you have the advantage of more warmth - like anything, all depends on how you plan to grow them.
Growing toms from bought fruit is probably a bit of a waste of time and effort - you rarely know what stock you are buying these days from the shops.
Given that tomatoes are usually a rewarding crop, it is best to buy reputable seed varieties or plants. For the cost of the seed, you will (or should ) get a worthwhile harvest.