What about this PC, did he get one ?
http://www.telegraph.co.uk/news/2016/11/23/police-officer-stabbed-bow-east-london
Or any of the soldiers who've died in the line of duty, do they get one too ?
Or Pc Fiona Bone and Pc Nicola Hughes?
The sad reality is that Police Heroism often goes completely unrecognised. The Queens Police Medal can be given for Gallantry, although it is more often given for 'meritorious service' to Chief Constables and ACPO ranks for 'services to Policing'. The QPM for Gallantry can be awarded Posthumeously but according to Wikipedia has not been awarded since 1977. Apparently there is another award the Queens Gallantry Medal, which can be awarded when the action does not warrant the George Cross.
As for Soldiers killed in the line of Duty, scandalously it wasn't until fairly recently that a new award, the Elizabeth Cross was instituted. This isn't a Decoration, but is a Commemorative Emblem given to the Next of Kin by the Monarch. It is given to members of the Armed Forces killed in the Line of Duty or as a result of Terrorist activity since World War II. In my opinion the recipients should be widened to include Ambulance, Fire and Police Staff also killed in a Terrorist activity.
Having said all that, I strongly suspect that Mrs Palmer and her children would gladly refuse a trillion medals to have him back. May he and the rest of the victims RIP.