Hello Herman,
Basically each Unit would have a Roll recording the details of each Man entitled to the relevant Campaign Award for that Regiment, in this case the Royal Fusiliers Roll B Sheet Number GS/8795 dated 26th April 1922 records the Men entitled to the British War Medal and Victory Medal within that Unit.
Details recorded are Regimental Number, Name, In sequence Units and Corps previously served with and relevant Regimental Numbers, Theatre of War served in, Record of Disposal and Remarks.
These Rolls are not always filled in completely and so with your Man we have his Number, Name and Units served in during the Great War and obviously the confirmation of his entitlement to the BWM and Victory Medal.
I have had a look for his 1914 Star entitlement and this is recorded on the Roll for 2nd Battalion Queens Royal West Surrey Regiment which is undated but shows your Man as Number S317 L/Cpl Allington, with a date of disembarkation of 8th November 1914. This Roll also shows that on 11th August 1919 this Medal was despatched by post to Him.
Hope this helps,
Simon