Travelling to and from the UK on visa

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If you were a visa-national (nations that don't get a visit visa on arrival) I would be inclined to say no. However, being from the USA, you can re-enter as a visitor if you have a good enough reason. It really depends what answers you give to the questions. Why are you returning to the UK so soon after living there? What is the purpose of this visit?

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If you say that to the officer when you return to the UK, you will be bounced straight back the USA.

Why delete the posts OP? Didn't like the answer?

Some people honestly, now the thread looks stupid and helps no-one in the future, not say disrespectful to Lucapooka who took time to answer the OP's question.

For the record and the benefit of others who may have a similar situation, my first response was to a question from a Tier 4 migrant whose leave expires in January. His course has already finished. He wanted to know if he could travel back to the USA but then return to UK before January, with his unexpired, but very short-dated T4 visa, even though the purpose of re-entry was not to continue as a T4 migrant.

My second response was based on the information he gave about the reason for his return (and potentially what he would say on arrival seeking entry clearance as a visitor). His intention was to return to continue living with his fiancee to look for a work opportunities in the UK. Something completely incompatible with a visit entry clearance.