Saw another post about a vax cylinder from Tesco which looks like it has sold out. So I had a look to see what others they had.
They are having a good sale on vax. But you can't tell as they don't say what the full price is.
Anyhow this looks like the best one to me. It's on Amazon for 178 and JL for 130 so at 69.99 it's a good saving. Reviews are generally very good. But best of all is the vax 6 year guarantee. If it last 6 years it's only cost a little over £11 a year.
I've bought one.