Posted: 03/04/2015 at 12:34
I've been doing similar to Gemma - my problem brambles are growing through other plants (large established azaleas) that I don't want to lose, so spraying is not an option. Instead I cut each stem back as far as I can reach and then poke in a bit of pipecleaner soaked in SBK. Took ages, as quite fiddly, but so far all is looking dead and no regrowth. Only did it about 6 weeks ago though, so time will tell.
theres a thread on here somewhere where I got the advice