i recommend LYTE trade ladders . i have 4 sets of these for my workers and i , two are 10 rung doubles and two are 10 rung triples . i got these after reading on the forum folk saying LYTE were best
theyre excellent and i got all mine thru BROWNS LADDERS ,up in the Midlands
only downside is that when they come there were several razor sharp edges on the ladder fittings,i took a needle file to all the edges to smooth them off , that took 1 hour per ladders .