Spanish tomatoes are a very particular example. Yes it's more carbon/energy friendly to truck out of season tomatoes from Spain (rail would be better!) than heat greenhouses either in the UK or The Netherlands but Spain isn't the only potential source of out of season fruit and veg. South African grapes and tomatoes are being *airfreighted* to the UK consuming something over 120 times their food energy value in fuel to get here.

While I like the potential for year round summer fruit and veg we're going to have to accept that a low carbon economy is going to be deficient in grape, tomatoes and strawberries for most of the year (not unavailable, waste heat from nuclear power stations could be used to heat some out of season growth). Likewise, aside from preserves blackberries (brambles), Damsons, gooseberries, plums and the like will have narrow 'fresh' seasons