Originally Posted by Cymro

Most common vehicles in C include plenty of hatchbacks and a couple of small SUVs:

Renault Captur - dreadful; noisy, gutless, cheap,
Vauxhall Mokka X - absolute pile of poo.

If these are your only options, the diesels are at least economical and quieter. Neither is especially refined or fast of course.

The proper cars are OK.

Vauxhall Astra - decent, can be a little slow depending on engine, mostly very good
SEAT Leon - excellent to drive, a little small in the boot. There are no Golfs, but this is the closest equivalent.
Ford Focus - reasonable but meh. No parking sensors.
Kia Cee'd - also reasonable.
Honda Civic - by far the best all-rounder in terms of equipment, space, performance, etc.

Most of those will have CarPlay - older Leons and Cee'ds may not, the Captur definitely won't. All Astras, Civics and Focuses will. If not, a UK SIM card and a mobile mount are cheap.

Some odd Toyotas (rare Aurises and C-HRs) and the competent but dated Skoda Rapid round out the fleet.

Two medium sized suitcases should be fine, but will be getting close to the limit (depends what you mean by medium sized). Hand luggage may need to go inside the car with you.

Gold Plus is recognised, but Gold Choice is not (despite the Gold Choice sign). So, as a gold member your car will be waiting in a numbered space, but you won't be able to swap it and upgrades are usually fairly limited. (You probably will get upgraded but into whatever is lying around - most often that means a fairly crappy small SUV).