NONE!!!!
Where is the 'top/bottom' of the UK.
If you mean from North to South , then the usual quoted distance between John o;Groats (North) to Lands End (South) is 874 miles.
However, this can vary dependent on the method of transport.
909 miles
837 miles
The UK is 94,526 square miles
its probably about 200 miles from UK
About 310 miles
213 miles
180 miles
About 21.3 miles by road.
About 160 miles on the A14.
76 miles
London is IN the UK.
Scotland is in the UK.