No need to declare anything at the UK border unless you're exporting it outside the EU.
Thats what I thought until then customs offices stopped me and interrogated me. Last time I flew I read a notice explaining that anything over £1000 could be confiscated ANYWHERE in the UK unless you can prove where it came from and that it was not the proceeds of crime.
They also said you have to declare anything over 5000 euro's when leaving the country.
As I said, take bank statements and withdrawal slips with the money. If you have any sort of criminal background you will have a particularly difficult time.
Show me the law that says this.
It was on the wall just past the security scanners at Stansted airport.
Powers of stop, search and seizure
When can the police stop and search you
The police can stop and search you without having a search warrant if they suspect you of being in possession of:-
an offensive weapon; and/or
stolen property; and/or
alcohol if you are at certain major football or rugby matches or on public transport travelling to such an event; and/or
evidence in relation to an offence under the Protection of Wild Mammals (Scotland) Act 2002; and/or
cash or the cash equivalent of £1,000 or more and that this is the result of criminal activity
fireworks that you intend to use anti-socially.