Hi Laura
Have you tried the yard at Lyde? It is just 2 miles from Hereford. There is also a yard 1 mile from Hereford - both are listed in the lineage section (below banner and wanted ads) on the Livery in Herefordshire page.
http://www.herefordequestrian.co.uk/livery_hfds.html
(scroll right down page!)
This one, although I dont know whether DIY is possible:
Great livery opportunity.
Full/schooling livery available on small private yard 1 mile south of Hereford. Transport to competitions available. Complimentary coaching, help with problem horses.Very reasonable rates. Contact Ton on 07775947076
Another thought.....
I used to live at Warham Court Farm, Breinton. Right on the edge of Hereford. There is a 20x60 gorgeous arena, and lots of presumably empty stables. I have no idea whether they would consider DIY livery, but best drop by there and ask. The paddocks I used for turn out were year round - fantastic drainage. Worth a try! Drive out of Hereford on Barton Road, towards Crematorium. Turn left down Broomy Hill. On into country. 1st farm on right.
oo i think i rang about that one and they didnt do d.i.y but i can always double check. ive contacted so many! the realy nice ones are too far away :(
thanks
i think i came to you once, years ago, about bringing my coloured horse for lessons, so i have a vague idea where it is. you dont have a number for the place?