Lyles are the only Alfa specialist I know who, on their website, are offering to change the cam belt only (without tensioners).
I had my cam belt changed at Lyles when I was new to Alfa ownership and before I discovered Internet forums such as this one.
I while later, when I was a little more clued up, I called and spoke to the service manager and was assured that the tensioners would have been done too.
Recently, about 18,000 miles later, I had to have the variator changed and decided to have the belts and tensioners done again at the same time, at a different specialist.
It appeared that the tensioners Lyles had supposedly changed were the original ones.
Quite scary considering my car had covered 57,000 miles.
I won't be using Lyles again.
I now use and can highly recommend BMC in Newton Aycliffe.