It turned out to be less of an issue than feared. I went and got a set of car ramps and I put the rear wheels on those. That was more than enough to get access to the rivets so I didn't need to jack up the front at all. I only had 2 issues. Firstly since the beginning of the lockdown my garage had become a bit of a dumping ground so I had to spend a few hours clearing up before I could get access to the axle stands and my trolley jack! Secondly, I can't remember how I jacked up the rear before but there was no way the trolley jack was going under the de Dion joint so I had to jack up a rear corner, put an axle stand under that to give me enough space to get the trolley jack under the the de Dion joint. I could then jack up enough to place the ramps under. There was no way, especially on my own, that I would have been able to drive up on to them! Anyway, there were 4 rivets that needed re-doing and that only took 5 minutes!