requirement of the PRM (Persons with Restricted Mobility) TSI, with which all UK trains have to be compliant. In mid-to-late 2019, a number of West Midlands Train's Class 323 units were used for an in-service pilot test of retrofitted Double Variable-Rate Sanders, sponsored by the Rail Safety and Standards Board. The test demonstrated that the new sanding equipment significantly improved braking performance in low-adhesion conditions. Fleet details Vehicle numbers ranges are as follows: DMS: 64001–64043 and 65001–65043 TS: 72201–72239 then 72340–72343 Named units A number of units are named these are as follows: 323201: Duddeston 323202: Butlers Lane 323203: Aston 323204: Selly Oak 323205: Blake Street 323206: Barnt Green 323207: Bournville 323208: Five Ways 323209: Birmingham New Street 323210: Shenstone 323211: Four Oaks 323212: Bromsgrove 323213: Sutton Coldfield 323214: Wylde Green 323215: Gravelly Hill 323216: University 323219: Kings Norton 323220: Lichfield Trent Valley 323221: Northfield (subsequently de-named) 323222: Redditch 323240: Erdington 323241: Dave Pomroy 323 Fleet Engineer 40 Years Service. 323242: Alvechurch 323243: Longbridge Notes References Sources Further reading 323 Train-related introductions in 1994 25 kV AC multiple units