Test transmissions for the new local radio station were carried out from Wrotham, Kent, on 95.3 MHz in FM mono, relaying BBC Radio 1 (at the time broadcast only on medium wave), with several announcements informing listeners of the new service. On 6 October 1970 BBC Radio London was launched, three years before commercial radio for Greater London in the guise of LBC. An additional medium wave frequency was allocated on 1457 kHz (206 metres) from Brookman's Park. 95.3 soon changed to 94.9.