RNAS Merryfield has a post WW2 tower with a metal ladder. ISTR that they have a 2" thick mat at the foot, and a wrap-around frame to stop people falling back.
FYI your injuries are enough to warrant a report to HSE by the supervisor, and you might point out to him/her that 80% of fatal falls in the construction industry result from a fall of less than 2m, I think. You sound as though you suffered a slight concussion. Take it easy.