As I am a little short on plants and time is ticking on, I am going to get some fillers. It is what I did last year - I was too late to plant seeds then. Next year I'll see if I can get better results from growing from seed.
I think this weekend I will take a trip to Dundry Nursery. I stumbled on their website when I was browsing seed potatoes a while back. It seems they are somewhat of a specialist in such things. Their website is: http://www.dundrynurseries.co.uk/ if you wanted a nosey. Looking forward to it :) My purse probably isn't!
When I was away in Kent over the bank holiday, I bought some plants at a great nursery called Potten Farm - last year I bought from them too. If you're in the area, I suggest you pay them a visit.