B&B I think, although bivvy+tarp is also an option. We'll see - I like the idea of staying on the Downs if doing the South Downs Way over two days, but in other circumstances I would favour having a shower in the morning.
You can get a tent that'll fit, as well as a inflatable mattress and sleeping bag.
You don't need to be completely uncomfortable, a tent pole can be mounted on the top tube between the frame bag and top tube, allowing the tent to be compressed a lots more.
B&B I think, although bivvy+tarp is also an option. We'll see - I like the idea of staying on the Downs if doing the South Downs Way over two days, but in other circumstances I would favour having a shower in the morning.