The National Archvies online catalogue
http://www.catalogue.nationalarchiv....uk/default.asp
has an index to the Royal Hostpial Chelsea, discharge documents of pensioners - certificates of service and has the full class/piece number to order the document. The index covers up to about 1858.

It mentions three men born in Coltishall

WO97/671/64 Robert FOX, born Coltishall, served in the 54th Regt of Foot, discharged aged 29. The covering dates of the record are 1822-1830

WO121/28/166 Clane NAVE, born Coltishall, served in the 9th Regt of Foot, discharged aged 36 after 17 years servce. Document dated 1797

WO121/116/24 Thomas CLAYTON, born Coltishall, served in the 25th Light Dragoons, discharged aged 21 after 3 years 1 month service. Covering dates of document 1806-1811

Geoffers
Charlbury, Oxfordshire