Church Street Dental Practice, 10 Church Street, Houghton le Spring, Durham, DH4 4DN. Telephone 0191 584 3247. CSDP (UK) Ltd trading as Church Street Dental Practice is a credit broker not a lender and is authorised and regulated by the Financial Conduct Authority, 840271. Registered in England & Wales 07257396. Registered Address: 10 Church Street, Houghton le Spring, Durham, DH4 4DN.