Hi birdaman,
as someone who used to hire instructors from time to time, I am confident in saying that it will make no difference at all, if you are good enough to convince the CAA that you deserve an instructor rating, then that should be it (subject to interview and possibly a check flight before you get the job)
what will make a difference is if you are any good or not once you are hired and how you get on with the students, and if you come across as someone who is just hourbuilding because they really want to do commercial work or someone who is genuinely keen, the students can sense it, they are often very successful people.
and also are you prepared for the lifestyle?, losing all your weekends and working excessive hours for relatively low pay, and changing your plans at short notice to accomodate the flying school. because generally they will wany excessively loyalty from you, but offer none back.
but a 2 year gap in training, no one will give a damm, and why should they!
regards
CF