Via Flickr:First World War group of medals.
Mons Star to 34259 Pte W Uden RAMC
BWM and Victory Medals to 34259 W.O.Cl. 2 W Uden RAMC
Meritorous Service Medal to 34259 S Sjt W Uden 11/F.A. RAMC.
1) Friday the 21st December 1917 for his Mentioned in Despatches. This entry records Walter as Acting Quartermaster Serjeant.
2) Friday the 14th June 1918 for confirmation of his Meritiorious Service Medal Award. This also shows that Walter was from Catford, London.
His MSM card confirms Walter as serving in the 11th Field Ambulance in France.