David J. Hayes comments " As per the May 1970-May 1971 WTT, this weekly summer Saturday service ran as 1M55, the 12:20 SO Ramsgate to Wolverhampton High Level (arr. 16:40). It was the balance of 1O91 (also Southern Region coded H6) and booked to run for the period 13th June to 5th September 1970. The service would be electric-hauled from Willesden (Mitre Bridge Junction) through to its West Midlands destination "