For about the past ten years or so, the british rasberry season has been extended from approx 8 weeks, out to 16 to 18 weeks. It is all down to poly tunnels.
This in turn has meant that the British farmers have claimed a significant part of the market that has long been the domain of overseas growers, due to their more suitable weather...Bless them !
... we have been eating new potatoes for a month or so... planted them in the tunnel in February. It's definitely the way forward.