Silly problem to do with code interpreting 2/1/2000 as the first of Feb. Usual story - got some code that works, some that doesn't and I'm playing spot the difference!
All new posts made today on the gassing station are dated 1st February. Did I miss something or has January simply evaporated (still it's nearer springlike roof off weather, so not such a bad idea after all) Some might object to losing a whole month of life though.