Raspberry identification

[Lymmguineas]

I've now got more allotment than last year having acquired the one next to mine which was abandoned. It's probably about 50% raspberry canes. I've cut back the ones which I know are autumn ones (one of the other plot holders remembered picking some) but there are lots more. How can I tell the difference between summer and autumn canes at this time of year and what damage will I do if I cut back summer canes now?
Any advice welcome!

[veggiechicken]

Cut out all the dead canes first.
Summer fruiting rasps will fruit on last year's canes so you don't want to cut them out.
Autumn rasps will be growing new canes anytime now - leave them!

Basically, if its dead, cut it out; if its alive, do nowt.

[Jimny14]

OK so there's a couple of options. Hack em all back down to the ground and see what grows. Summer fruiters won't bear much if any fruit (they do occasionally bear the odd one apparently). But autumn fruiters will fruit this year.
Alternatively and probably better. Leave everything for now, let everything come in to leaf. Then cut out anything dead once everything is well underway. Then keep an eye on everything, anything that grows and fruits well this year is an autumn variety, everything that fruits on old wood is a summer, cut the stems back after you've picked em and leave the ones that haven't fruited.

[It never rains..it pours]

My autumn raspberry's that am double cropping are starting to leaf (not great with the coming weather) where as the summer ones are at best at bud stage, if thats of any use

[Lymmguineas]

Thanks everyone for the advice.
It's been too cold to go down to the allotment and do anything.
Think it's going to be next weekend before I can get down there again but think I will just go with the advice of cutting back the dead stuff and leaving anything alone that looks alive.