In reply to Jus:
We got sliding doors from http://www.slideandfold.co.uk/index.html ours came in kit form but IIRC they will arrange a local fitter if you're not into DIY. Product, documentation and paperwork was excellent. My only gripe is I went for grey on a south facing wall, they're sufficiently well insulated that in full sun they get hot outside, stay cool inside and warp a bit making the latch a bit sticky, I need to file a bigger chamfer on it to sort that.
It felt like a bit of a gamble buying a big item online without knowing anyone else who'd used them but they turned up on the appointed day as described and I've since found a friend has used them too with the same experience. All in all I'm very happy, nice product, right price.
IIRC Express were very expensive.
jk
Post edited at 09:27