A few people have asked,
So I'll add my 2p worth.
I've used a ARB that I found 'listed for'
A MG/MGF !
The bar is 20mm thick.
Note the two holes in end of bar. (I cut these off and drilled new holes)
I marked up the hole on trailing arm
Lay'd the bar on so it ran parallel and central to beam and marked holes for new fixing.
I then welded on 4 studs to hold it down.
The bar came with the rubber bush seen below. But the brackets didnt have enough of a arch to them so I used others I had. Think there std GTE front ARB clamps.
^^^^^ different clamps^^^ larger ones where the ones I used.