That depends on what you mean by "near." Basically, France is between Spain and the UK. Spain is much nearer to the UK than to Australia, but much farther than France, Portugal, or Morocco.
5 shillings
1 Euro
98 cents
Legally there is no limit.
Free if the dog has wings!
In the UK a standard first class Royal Mail stamp in December 2013 is 60p.
To send a letter to the UK, First Class (that's Air Mail,) the stamp costs $1.02.
Yes, have you ever received a UK passport stamp while traveling?
The UK visa reference number should be contained within your stamp. Every time you have visited the UK, you will have received a stamp. If you had used a visa, there will be a reference number within that stamp.
Spain is an hour in front of the UK
Spain is larger physically, and has a larger population than the UK.