Any weedkiller with glyphosphate as above will do the job, there are many brands out there, only use when weeds are actively growing to get best results.... the glyphosphate will kill from the root ball up... round up has been made weaker in the last few years, and is getting expensive, so best use gallup 360 made by barclay, Weed free 360 made by hygeia,
rambo, the list is endless...
for bramble etc, use garlon 2, brushwood killer, or scrubkiller. at a rate of 120ml/ 20L of water normally....