Hi Annie,
Barnes served in the 1st Regiment of Foot Guards - the ones mainly based in London for the protection of the Monach. They later became the Grenider Guards, not to be confused with the 1st Regiment of Foot who later became the Scots Guards.
I was very confused by this at the begining until the difference was explained to me.
If you look at the documents, most were members of a Foot Regiment not a Foot Guard Regiment. Those who were Foot Guards were born in Barnet, Tunbridge and Kittering and it is now one of the reasons why I am not too certain regarding a scottish birthplace. I suspect or mayby I am just hoping for, a Home Counties birthplace