Hi - i need a PA system for a small gig in central london next week.

i was wondering if anybody out tere had or knew where i could get my hands on a PA (i have mics and stuff already), ideally for free or at least very cheaply. just need to run vocals through it.

the gig is unpaid, there is no money off the door and the promoter/venue won't contribute so i'm making a loss already.

cheers!