It was!!
Stable door springs to mind for me but you live and earn. First thing tomorrow I'll be on to the Land Registry.
Thanks to all those that have replied with their experiences. I hope others get some tips from them before they get a 4 figure balance owing.
It's gutting when the amount of annual tax on my salary is horrendous too without adding this little lot on top.
The cost of childcare x2 far outweighs the benefit of SWMBO working full time so only one salary and just above the cut off limit is a bit of a killer.
Ho hum.