I found this article in the 'Croydon Advertiser' dated 16th October 1959:
“FREE RECORDS OFFERED - To celebrate the opening of their new premises tomorrow (Saturday) at Station Road, West Croydon, R. H. Television Development Co. Ltd. have arranged a special one week offer. All purchasers of TV sets or radiograms will be entitled to make their own selection of the latest gramophone records free to the value of £5. Next door to the new shop the firm are also opening a Record Rendezvous.”
… and this advert in the 'Croydon Times' dated 16th June 1961:
“ALWAYS BUY YOUR RECORDS at RECORD RENDEZVOUS Station Road, West Croydon. We give Green Shield Trading Stamps with every purchase.”
… also this advert in the 'Croydon Advertiser'16th November 1962:
“Drop in and see us NOW! R. H. TELEVISION DEVELOPMENT CO. LTD. at 10-12 STATION ROAD, WEST CROYDON, SURREY. Phone: CROYDON 1096.”
… and they had branches in London/Kent as well:
'Lewisham Borough News' dated 1954:
R H Television Development Co. Ltd., 4, London Road, Bromley. RAVensbourne 0143.
'Sevenoaks Chronicle' dated 1954/5:
R. H. Television Development Co. Ltd., 22, Market Square, Westerham. Tel. WESterham 22091.
'Sevenoaks Chronicle' dated 1959:
R. H. Television Development Co. Ltd., 4, London Road, Bromley. Tel. RAV. 0143; 81, High Street, Orpington. Tel. ORP. 25731; 22a, Market Square, Westerham, Tel. WES. 2109; 10-12. Station Road, West Croydon, Tel. CRO 1096.
'Whitstable Times' dated 1963:
R. H. Television Development Co. Ltd., 83 St. Dunstan's St., Canterbury. Tel. 1113.
'Faversham News' dated 1967:
R. H. Television Development Co. Ltd. 119 High Street, Sittingbourne. Tel. 4022.
Dave