Interestingly mixed experiences here. As I don't have a speare £30k I can't test for myself but I might try buying a few. It would appear to me that those of you with a £1k - £5k won in the early years but not so much since. Maybe I will think about buying some each year rather than all in one go. Also worth going for the bank credit option by the sounds of things to make sure nothing gets lost in the mail or redirected to the wrong address. Good luck for January Ric.ror.
I do online banking and anything I win gets paid directly into my bank account. They also send an email informing me of what I've won. Saves having to take a cheque into the bank and there is no risk of a cheque getting lost in the post.
I have about £2000 and win very occasionally, OH has around £7000 and frequently wins more often £25 now but has won £1000 once, and £200 now and again. He always has his winnings reinvested. I like to receive my cash.