Buses, coaches, & lorries

Wigan Corporation Leyland PD2 on route 22 from Abram to Marsh Green, a cross town journey.
The location is Tram Street in the Platt Bridge area of Wigan, which was the site of a tram depot.
I assume that the tram depot was for Wigan Corporation, but I am not certain, perhaps it belonged
to Lancashire United Transport who had one of their big bus garages not far from this site.
I know that L.U.T. had trolley buses for many years. Someone with better local knowledge than
me would know. Regards, Ray Smyth.