you could try Hawkshaw Horse Transport.
I stable my horse on the farm the business is run from. Lovely, caring people and a very nice modern box.
http://www.hawkshawhorsetransport.co.uk/ They are based in North Manchester (Bury/bolton area) and they transport localy and all over the UK. I know they have transported shetlands to shires.
HTH, Aimi.