Glad that everything went well for you in London.
I will second Jeff T's advice to walk, walk, walk, walk.
I hope you got the clip for the hose for the night bag. I got the night bag at the hospital. There was a simple clip on the hose that clips on to your clothes.
I slept on the couch until the catheter was removed because I was afraid of doing damage if I tossed at night. Attached the hose clip to a cushion.
Using the clip helped anchor the hose. Forgot to use it once. That's all it took to remember every time after that!!
As David says, don't use the leg bag at night. You wouldn't want to get an infection!