Thanks for the helpful answers. Just bought and fitted a belt off Solent Tools.
While preparing the belt I was distracted by my daughter and it survived boiling dry!
Because it's a fiddly job I removed the top of the saw from the body, it's only 4 bolts in each corner. The internal flex is just long enough to put the body to the side.
It's worth checking the bolts holding the machine together while you have it apart. I found several loose.
Phil Price
June 2015