I'm not in your area so can't recommend any from experience but I'll link some places near you :
This is a good website to find local sellers :
http://www.chickens.allotment-garden.org/poultry-suppliers/pol-hens-for-sale-Shropshire.php
http://www.redbrookchickens.co.uk/chickens-for-sale-shropshire
http://www.shropshire-poultry.co.uk/home-
http://www.shropshirepoultry.co.uk
This is a good website to find local sellers :
http://www.chickens.allotment-garden.org/poultry-suppliers/pol-hens-for-sale-Shropshire.php
http://www.redbrookchickens.co.uk/chickens-for-sale-shropshire
http://www.shropshire-poultry.co.uk/home-
http://www.shropshirepoultry.co.uk