From what I hear of that Travelodge, it is so low rent if they did have a system it wouldn't work.
I parked up by Starbucks this morning and had a look around - as @tronnogull said, signs warning about theft but nothing visible about any time limitations in that part of the car park.
Not seen any signs and as there is a Travelodge there as well it is unlikely. I’ll have a check for signs when I stop off at Starbucks tomorrow morning