Have you contacted your local council for permission to erect a greenhouse on your plot? My wife and I had the same problem with growing tomatoes outdoors and so we contacted our local council and they agreed that we could erect a greenhouse so long as it was not permanently fixed ( i.e. no concrete base or foundations) and was not constructed of glass. We bought a lovely 8×6 polycarbonate traditional styled greenhouse for just under £200 and this has been on our plot for 2 seasons now and has given us a great crop of tomatoes and cucumbers.
Amac