Ralph, unless you have R22 on your licence you won't get to teach anyway. Unless the rules have changed you need 30 hours piston to instruct on one and I seriously doubt if any company will pay for you to do that, it will all have to come out of your pocket unless you have a friend with an R22 - even then you will still need your 1179 on type first before you can log the hours.
Have you actually looked at what civvy instruction entails - it is different from what you are used to at Wallop and unless you have flown an R22 (and done an EOL in one) I suggest you do before trying to get a job teaching in it. You will be competing with hours hungry civvy low timers who will work for less than you to do the job and you will be expected to be at the beck and call of the student - slightly different to what you are used to!
You are far better off looking for air ambulance/police work where your military skills are more useful and desireable.