Mixed in with a William Edgar SCOTT's records in the WW1 Service Records (WO 363) - and they may be one & the same man, although different Reg Nos & birth details are given:

Frank W PURYER, b c1880 (Stamford, Notts), home address West Bourne Park, London. Enlisted Bedford, November 1899. Served until 1919, several items of later correspondence. Reg No 48110 (Northants Regt).
William Edgar SCOTT, b c1882 (London), served July 1916 to 1919. Reg No 48100. Home address Westbourne Park, London.

Not all the records are present - eg there are no details of family. Perhaps PURYER re-enlisted as SCOTT in 1916?

If he's yours, I hope this helps!

Anc****y, SCO, pages 48259 to 48312