Thanks to my manager 'filing' my MATB1 form in the pile of junk on his desk for 3 months,instead of sending it off to head office,I only got my SMP1 & MATB1 forms back yesterday. 
I've sent them off today,special delivery,it will arrive with them tomorrow morning.
When can I realisticly expect a response? How long did it take for money to hit your account after you got a response?
Will they backdate?
I'm already on Mat leave,I left on the 7th.
Thanks 