After getting hold of the 1915 red enamelled "enrolment" badge I thought that would be enough .........then I spotted this little beauty !
‘P’ series = “D. G. Collins Newgate St London Warranted Fire Gilt”
Stuck in a last second 'sniping' bid and got it .........for £6.09 + postage (my max bid was £15.00) , it arrived today and am very happy with the badge.