In the foyer at St Pancras New Church, on the corner of Euston Road and Woburn Place, and across the road from Euston railway station. Something appears to be missing, towards the top of the plaque where there are two holes. A laurel wreath?
THE CITY OF LONDON IMPERIAL VOLUNTEERS
DULCE ET DECORUM EST PRO PATRIA MORI
IN MEMORY OF ALFRED FREDERICK CLEAVE
A PRIVATE IN THIS REGIMENT AND ALSO IN THE
18TH MIDDLESEX (PADDINGTON) V.R., SON OF
ALFRED AND CHARLOTTE CLEAVE OF THIS PARISH.
HE DIED AT SPRINGFONTEIN AUGUST 22ND 1900 DURING
THE SOUTH AFRICAN CAMPAIGN, AGED 22 YEARS.
Perhaps a wreath as you say - or the badge of the CIV?
Palmer has it that "389 Pte A.F. Cleave of City Imp Vols" was wounded at Diamond Hill on 12/6/00 and Died of Disease at Springfontein on 22/8/00. The Palmer entry records his initials as "A.P." in the second instance.