Letter sent by John (the UK), made of a page of a magazine (I guess). Very British mail!
Look at the stamps. They belong to the series about the history of Buckingham Palace, issued on 15 April, 2014. The Blue Drawing Room is a very cool name, isn't it? In fact, I too draw and write and make mail art in a blue room... (a bit less luxurious, I'm afraid).
I want to add an original print made by Alan (the UK):
"The rose symbolises England, the thistle is Scotland, and the red hand is Northern Ireland. Wales is not represented in the flag, so I made the pole out of daffodils and leeks."