What an excellent idea to scan your grid and send as an e-mail. This will save me £1.50 per week. Serves the Royal Maill right for outpricing themselves.
I was spending well over £100 a year with crossword postage so with the increase I decided to end crosswords. However now I send by email. If my experience is replicated to some extent throughout the UK then the PO have certainly lost instead of gaining.