I haven't been back in here nor seen the last few comments - as nothing had happened and life was very busy....
I will dig through and see what paperwork I have.. and re-do the initial letter I received but am not at home for a few days so wont be til then.
Have now, finally, many months later - received an OFR in relation to this, it has now been 'logged' at Northampton and the amount gone up to £205 from the £195.
I would like to point out I am not seeking to challenge this whole thing, I am fine (no pun intended) paying the original £65 or whatever it was - am just damned if I am getting reamed for a further £140 merely because we have a shockingly bad postal service.
Anyhow, will get the original letters dug out when am back home on Sunday evening.
PS: - would like to mention that the private PCN matter I was dealing with via MSE forums (alluded to above) was sorted satisfactorily in the end. The PPC pulled out two weeks before court. A year long process and a lot of time and faff basically boiled down to who would blink first...