Go to the recruit office and explain what you have done and they will find out wha you have to you. You may have 4-5 weeks shaved off basic reg trainin as you will already know wha is done in that perioid.... u know..
LOAD.... MAKE READY... UNLOAD.. MAKE SAFE... and fitness..that borin bollox.....so you will need to do basic, but join later in the cadre.
It's heard of that people who've been mobilised are sometimes being offered a place with the unit they served with and being able to skip various bits of the training-I guess it depends how much experience you've got, bloke I know that has had the offer had been in TA inf and RA for years, done CIC and was out playing in Afghanistan.. I'm not sure how it works, you could end up on a kind of permenant FTRS engagement.