Cheers Joe, I don't think I was putting my brain into gear this morning when
I posted that as it now seems so obvious.

The next problem doesn't seem that obvious to sort out:

Rain LTA %
77.0 64.3 ??

Also:

Pressure LTA
1015.5 1018.2 +/- ??? hPa


What formula would you put into the cells to give the ????

Thanks
________________
Nick G
Otter Valley, Devon
83 m amsl
http://www.ottervalley.co.uk