Hi Londongardener,
Not sure that they will appear now; my raspberries are in leaf and bud already, and I'm a lot further North.
You can definitely plant them now, with the benefit that they should be showing some signs of growth. In previous years they've been on sale in the supermarkets at this time of year as special buys, that might be your best bet at the moment. I've also transplanted suckers successfully many times, around now, if anyone has some going spare.
G&R