I found this advert in the 'Harrow Observer' dated 18th December 1952:
“TELE-SOUND SERVICES LTD., 37 COURT PARADE, EAST LANE, NORTH WEMBLEY (Junction East Lane - Watford Road). Telephone: ARNold 5201/2.”
I also found information about Tele-Sound Services and an image of a Private Recording Service label (with the shop address on it) at this link:
http://www.mgthomas.co.uk/Records/PrivateRecordCompanies.htm
“Tele-Sound was a shop in North Wembley, Middlesex, owned by David Comber (father of Michael Comber, record dealer and enthusiast) and his partner Arthur Moseley. The shop sold radios, televisions, record-players, records, etc. Tele-Sound also offered the service to make your own records. The record shown here was actually made by the Comber family (including a 3 year-old Michael) under the name of The Marion Road Glee Club and they are singing 'The Old Folks At Home'. David Comber worked at the shop from 1950 to 1956 after which he sold out to his partner so the record dates from that time.”