I recently used Bypass at Eastleigh and would highly recommend them. Cost was around £800 for four days plus test. I passed first time with only two minors.
Give them a call and they’ll arrange a free assessment drive for you.
Regards.
I’m from the same area as you, the 2 main ones in the area are 2 Start in Fareham (Artic) & Roadwise LGV (Drawbar) in the industrial estate in Portsmouth. I’ve no experience with 2 Start but I had an assessment with Roadwise. It’s an old MAN F2000 18t with a 20ft container drawbar on the back IIRC so quite a big vehicle. I called them for an assessment and they gave me one, perfectly friendly people & both accredited instructors but it was a slap over gearbox which I just couldn’t get my head around personally.