I have no records of a Yeoman Warder Lockyer, he was a member of the Yeoman of The Guard, there are two Arthur Lockyers
1. Arthur Lockyer, Yeoman Guard from 1925 to 1957, a BSM in the Royal Garrison Artillery
2. Arthur Lockyer, Yeoman Guard from 1925, who was a Farrier Serge Major, in the 7th Hussars