Cornwall is a region in southwest Britain on a peninsula bounded by the Atlantic Ocean, the Celtic Sea and the Channel.
River Thames, Houses of Parliament, Nelsons Column in Trafalgar Square, Eros in Piccadilly Circus, Westminster Abbey, Tower Bridge, etc. etc. etc
51 degrees North and 0 degrees East/West
No, the UK refuses to adopt or accept Euros.
The UK uses the pound sterling (pound) - £