Arnold, Simpson’s seeds [formerly the tomato growers club] have a good range of all sorts of good veg seeds, they don’t have a web site as such yet. Contact them and they will send you a catalogue early oct.
email: sales@simpsonsseeds.co.uk
Telephone
01985 845004
Fax
01985 845052
Address
The Walled Garden Nursery
Horningsham
Warminster
Wiltshire BA12 7NQ
With you being somewhat further north you may need a small glasshouse or polytunnel to do well with some vars. But gardeners delight, a small tom about 1 inch in diameter should grow ok, it has such thin skin it will split if you knock it but bursts with flavour. I get a hundred or more per plant.
If you have a south facing wall that you could grow tom’s against, you could do much better.