You're gonna need 4 or 5 canes and some string - place the canes round the outside of the plant, wrap the string round the canes and on the plant if you have to, to support it. Won't look great, but nothing else to be done. Next year, put supports in place as it grows rather than waiting for it to fall over.

Thanks - I'm off to the shed then to gather supplies!!

Blimey, hope its not as wet there as it is here, then!

Yep - it's really wet - I may drown on the way :0)

Drowning up here too!

so - I've done it. Thanks for all replies - it looks much better now :)