I've done a couple of tandem free-falls, both from Langar, near Nottingham:
Langar I had the video / pictures for the first one; a brilliant souvenir! That one was to raise funds for the Backup Trust (I raised over £500).
Second time was a birthday present from my lovely wife. The guy I jumped with asked me if I was getting it filmed, I said 'No, I did that last time' he said 'Right then, we'll have some fun on the way down if you like?' --'Yes please!!!'
It was wicked (or should I say 'totally sick' nowadays?). The guy was a nutter. He let me take the controls and encouraged me to stall the canopy; it collapsed; I screamed like a baby!
First jump was a clear day with a great view, next jump was overcast, but it was a hoot hitting the cloud layer at about 120MPH. Landings both times were incredibly smooth; they had catchers ready by the gravel pit; not the slightest bruise or anything!
The only thing you might find tricky is holding your legs up, but I'm sure they will find a way around any problems; they tend to have can-do attitudes!
Backup are doing a sponsored jump on 16th September in Oxfordshire I would definitely recommend getting involved in this; you can help other people out at the same time. They usually have sci people jumping at these events.
Backup calendarClick to view attachment