Criminal records...

[ukman]

Last year I finished a 2 1/2 year jail term in Australia for drug offences, then I was deported back to Britian Does this record automatically transfer over to the UK?

[Buenchico]

It's almost certain (because you were deported) that the Foreign Office will have been made aware of your conviction, so there's a record of it somewhere within UK 'officialdom'.

However overseas convictions do not show up on UK CRB checks:
http://www.crb.gov.uk/Default.aspx?page=289&qi d=449

If a potential employer was aware that you'd spent time in Australia, he could seek an AFP check:
http://www.crb.gov.uk/Default.aspx?page=2320

Chris