WMPTE - to be correct is or was QWest Midlands Passenger Transport Executive, they ran the buses when the 'West Midlands' was created as an entity, previously it had been Birmingham City Transport, Wolverhamptom, Walsall, West Bromwich & Coventry Councils, with Midland Red (Birmingham & Midland Motor Omnibus Coy BMMO) doing mostly rural routes.
Whilst working for British Rail in the Signalling Dept, I was successfully promoted to a rare & little known Dept called BTA - British Transport Advertising - staffed & ran by BR, it covered Commercial Advertising on British rail Stns, forecourts, Bridge sides, Sealink Ferry Quays & The National Bus Companies. Divided into 4 areas, London, Birmingham, Manchester & Glasgow, we covered a line from the Humber to Aberystwyth down to a line the Wash to the Severn. We had road side hoardings on Railway property, Brisge sides & on platforms & forecourts available for rental to Companies. We also had bus Companies such as Lincs Road transport, Western Welsh, BMMO, United Counties. We successfuly bid for & obtained the contract to run the commercial advertising on WMPTE - and my job was created esoecially to manage the records of that.
In the pre computer days, every bus had a card with it's number on, maintained in a wheelie bin storage system by garage, which showed what advert was on the Left hand side, Right hand side, Upper Rear, Lower Rear, and interior bulkheads.
Our posting staff were based in the old Waterworks Road depot. The biggest advertisers were the Pools Companies (pre lottery), and the tobacco companies. Many poster campaigns ran for a short period and had to than be removed or changed, so it was a fiddly recording. We also had to know how many spaces were available at each depot for sale. Buses of course, often changed depots to balance the mileage they wre doing, or often were de-licensed - taken out of service if they were undergoing long repairs or big services.
Often when a bus had had a new poster pasted on the side, it would go through the cleaner which would take it off - and than be reposted by another billposter with a differant advert! - we had many 3 sided buses on paper!
When we took over the contract we all had to go and check every bus for every advert - stocktake! - to create then database as we had poor records passed to us.
I was fortunate enough once to have to deliver some pics of the first 'Painted bus' to the WMPTE offices in Summer Lane, they had a pic of almost every type of bus they had on the wall in the corridor - looked superb. They also used to have an arrangement with the DVLA that their buses , which had a 4 digit 'fleet No' had blocks of Registyration No. so the last 3 digits of the fleet no. was the same as the Reg no.
They obviuosly cannot do that now they have the new style reg no.s
I gather that now there are only a fraction of the bus depots left - Hiockley, Selly Oak, Cotteridge etc all gone - amoingst many others