If you look closely that is the screen shot I put up in the first place, postage and duty is extortionate, that is why my post asked for UK based supplies, but thanks for trying to help.
In the US they are known as Lag Bolt Handrail brackets, but that does not bring up any in the UK, but thanks for looking. May have to buy some long coach bolts, bend and weld my own, not something I want to do, but needs must.
I don't need to read that, I lived through it and the constant strikes at Fords Dagenham where are they now.
@Jacob You seem to be very blinkered in your view or is it just your contrary, don't bother to answer I already know.
Their voting rights where to go on strike and bankrupt the company they where blackmailing, tell me why the mines where constantly being bailed out when they where not making a profit, where did the bail out monies come from? 🤔
The foam backing rods are there to ensure the expansion material is not as deep as it is wide, ideal width to depth ratio is about 4:1 to allow movement, expansion gaps in brickwork should at every 4.5M approximately, difference between Acrylic and Silicone is that you can paint Acrylic...
You can see the guard here, it's just a rectangular piece of plastic with a curve on the top, I am sure someone with a 3D printer would be able to knock one up for you.
In that case you need at least a 30mm dia cutter plus the width of the shank and any bearing, maybe easier to get a spiral down cutter.
https://www.axminstertools.com/trend-spiral-down-cut-router-cutter-8mm-8mm-shank-107429?queryID=3d4d22407f471b7b6cbc288f5d58ab8d