Hi Annette,
Apologies for the delay in replying. Thank you for your kind assistance and indeed I did make an assumption on Archibald's CWGC entry regarding Thomas which in hindsight was an error on my part. In the meantime I have been looking into my two Great Uncles:
Pte Harold Barber - 202028, 1st/5th Bn., North Staffordshire Regiment who died on 01 July 1917 Age 26
and
Pte Archibald Barber - 47439, 2nd/6th Bn., North Staffordshire Regiment who died on 21 March 1918 Age 29
I have had some information back from a researcher at the Staffordshire museum in Litchfield. Following further research, I have discovered two more Barber's, one of which William, who was also born in Melbourne circa 1891 and was also killed in action during WW1 and coincidentally also lived in Castle Street according to the 1911 Census. William's details are:
Pte William Barber, 330864, 15th Bn., Sherwood Foresters (Notts and Derby Regiment) who died on 22 March 1918 Age 27
I am now trying really hard to substantiate if William was one of my ancestors, but struggling to find a connection other than they lived in the same street in Melbourne and share the same surname, (1911 Census). There is also a 4th Barber, (203631, C. Barber) born in Melbourne, who was listed as missing in the Derby Daily Telegraph, 19 Nov 1917 and as wounded the following day in the Derby Daily Telegraph, 20 Nov 1917 edition. It might be that C. Barber survived WW1 as he is not listed in the 81 men who are remembered on the WW1 Melbourne Roll of Honour.
Kind regards
Jeremy