Hi Mike
Only problem is the slabs are real stone, and the thickness varies
between 20mm and 35mm.

Any suggestions for something that will do the job that I can pick up
from one of the sheds?

I bought a 9" jobby from Wickes for under £40 and found a pack of two
diamond discs in B&Q on clearance for a tenner.

Cut all my slabs and I've still got it for the next job - at less cost than
hiring one for the weekend.

I'd zoom around all the local sheds/mail order guys to see who has what on
offer. Makro has some cheapies if you have a card.

Dave