The only other option would be to stick it in the highest interest paying fixed term savings bond you can find, or stick it in an ISA if you're a taxpayer. At least you would get a tiny amount of interest although such a relatively small sum won't earn much. Probably won't get your any ERNIE winners either !
I've been buying premium bonds too. I'm also considering artworks - get a limited edition small print by someone not too well-known but on their way up, or I'm wondering about those 100g (3.22oz) gold bars. Gold prices seem to have gone slowly down over the last year but may be starting to move slowly up. How about a wine-auction? Maybe premium bonds, then use some of the winnings for something more interesting.
Premium bonds can be great we had a �150 return on �1000 worth in less than a year...for us that was a cracking rate of interest! There is a risk that you may not win but your money is safe which counts for a lot and its great to get the odd cheque from NS&I landing on your doorstep! xx