You have already heard about the job crisis for juniors in the uk. May be better to save your registration money and postpone your plans for a year or two.
Having interveiwed overseas applicants in the past I suggest the following:
-Have a good understanding of the Uk system and NHS
-Research the post you are applying for - why do you want that particular job? -it doesn't look good if you want the job just because it is in the UK.
-Be prepared to work as an autonomous practitioner
-Sell yourself - what can you offer to the employer? There must be advantages of training overseas that you can bring to the uk - seek these out and promote them.

Good luck with your job hunt.