For a large letter weighing 251-500g, you need £5.15 worth of stamps to send it by the international standard service (delivery expected in 3-5 days), or you could save 7p and send it international economy (delivery expected within 56 days, though I can t see why anyone would want to do that!). If it s 501-750g, it s £6.60/£6.53. If it s 101-250g, it s £3.70/£3.63, so you can see why it s important to take your letter to a post office to get it weighed.
You have to take it to the post office and tell them it is going airmail to Poland
Will tell you at the Post Office as depends sometimes on weight & size..Is a standard rate for other European nations.
I've already told you this https://uk.answers.yahoo.com/question/in...