On 31/07/2020 20:18:53, Rod Speed wrote:
Fredxx wrote
What's the best way?

The appropriate blade in a hand held circular saw.
Not cheap tho if you are only doing that one cut.

As you say the blades are extortionate. I was wondering about getting a
diamond slitted (masonry) blade that might fit the saw, assuming I can
get one with the correct diameter and size or arbour.