worthy, (welcome), you won’t get any individual military info about your W.W.I relative from the PRO and IF the Records Office have his record, your £25 will probably bring you a three line entry. Lots of W.W.I records were destroyed in W.W.II., and, if he lied about his age to enlist he may well have lied about his name too. The CWGC have some fatalities wrongly sited because of this.

You appear to have no date, no regiment and no location? I suggest starting by finding his registered British name and date of birth, ideally verified by a birth certificate. Then you could call the PRO re National Archives to try and find a fuller listing with info about his date and place of death. If somewhere along the line you can establish his regiment, try that regiment’s museum or whatever they have?

Assuming he qualified for one or more medals, W.W.I medals were individually named. In theory there is a record of who got what and somewhere an address of where and to whom the medal was sent?

Whatever, I suggest contacting the PRO National Archives for their advice, giving them every bit of info you have.

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