Thanks An3
It is pretty straight - but it took about an hour of mucking around, lifting and relaying the pavers to get it to that point.
We were really surprised at how quickly it started to deviate in the space of around 2m - but as we were at the widest part which is around 6m across, it was mucking around with 12sqm.
As soon as I re-set the centre line, the task was on to fix it. I told the wife even I could not live with that job, even after a couple of days of heavy work. We needed to fix it there and then.
So, hopefully it will get finished next weekend, now day light saving has finished, I am getting home from work too late to do anything.
And the back...well Monday morning I felt every one of my 50 years!
Cheers