tensioning chain s2
 

Hi all,
I'm thinking about replacing the chain and tensioning components top and bottom, but I am getting conflicting views on whether the timing belts have to be removed to do this job. It appears on Clarks garage that you do, but other info I have seen seems to suggest this job only takes an hour or so, maybe that's just for the top pad? Would be grateful for the correct answer please. Thanx.