Posted: 10/01/2018 at 17:50
In some respects it will depend on your location and which tomatoes you prefer.
Heirloom toms are really just old varieties - both Shirley and Gardener's Delight probably come into that category. There are lots of new varieties which have been produced over the years - more disease resistant, cold resistant, etc.
Unless you have a heated GH on a commerical scale, you won.t be self sufficient in toms in the UK - at some point you will have to buy the fruit.
Decide what you like and what you want to use them for - picking for salad (or just picking and munching whilst pretending to check them ) the Sungold are a good bet. In a good summer, you can do them outside but they are equally suited to the GH. Slightly larger fruit but an excellent flavour are the Black Cherry - again in or out depending on your location.
The large beefsteak can be more problematic but worth growing if you can. Plum toms for use in sauce, etc. - again, depends on your space and aspect.
Up to you really