Posted: 30/04/2014 at 07:48
I'm not going to worry about my raspberries - after all they grow well in Scotland and they have much later frosts up there so I'm presuming they'll cope. Blackberries should also be ok.
I'm going to fleece my figs and gooseberries as they've formed fruit.
Beetroot are frost hardy so they'll be ok.
Cover your potatoes with layers of newspaper, tucking it in around the rims of the containers.
Peas and beans - I'd try to fleece them if you can - but don't panic - as you say you're in South London where it is generally milder so hopefully the frost won't be too bad - and if you do lose a few flowers more will develop.
That's what I would do - good luck