Hi Gubbins and Cabo
I bought this one from Tredz a year ago
https://www.tredz.co.uk/.Thule-92501-VeloCompact-2-Bike-Towball-Carrier-7-Pin_91095.htm
Cost me about £23 a month for a year on interest free credit.
I have two Bosch CD bikes each weighing around 21 kgs each I guess without battery, which I always carry in the car along with the heavy kryptonite U locks.
I have travelled considerable distances at 70mph ..mostly with one on, sometimes with both. Also along many bumpy rutted tracks.
I have never had a hint of movement or any issue with the rack.
I considered it quite an investment at the time at £270 plus about £130 for a new witter bar for my Mazda 6 off ebay
https://www.ebay.co.uk/itm/Clearance-Towbar-Witter-Mazda-6-Hatchback-2007-2013-MZ48A/202493976099?hash=item2f2594de23:g:8cEAAOSwlelb4ZP1:rk:14:pf:0
and £35 for 7 pin electrics kit off ebay
https://www.ebay.co.uk/itm/Universal-Single-7-Pin-Electric-Towbar-Wiring-Kit-including-bypass-relay/132784755236?hash=item1eea969224:g:K70AAOSw4WFbn5KA
fitted by a very reasonable one man band auto electrician for £110 (bar and electrics).
Total cost about £545 for bar, electrics, fitting and quality carrier by shopping around.
One year on I consider it the best money I've spent for a long time. So easy to take on and off. Width reduces by pushing in the tracks and lights so takes up little space when off car, and not too heavy to move around. Deterrent lockable, tow bar clamp and bike clamps with same key, and most of all, absolutely no worry about anything once on the move.
Just my opinion.