Quote Originally Posted by joebloggs View Post
i think the 6 months max stay is only for guidance, but some immigration officers would be suspicious if you stayed longer, and question why you're really are in the uk and could refuse you from entering the uk
The immigration rules do actually state a maximum of 6 months in any one visit.

"41. The requirements to be met by a person seeking leave to enter the United Kingdom as a visitor are that he:

(i) is genuinely seeking entry as a visitor for a limited period as stated by him, not exceeding 6 months; and

(ii) intends to leave the United Kingdom at the end of the period of the visit as stated by him; and

42. A person seeking leave to enter to the United Kingdom as a visitor may be admitted for a period not exceeding 6 months, subject to a condition prohibiting employment, provided the Immigration Officer is satisfied that each of the requirements of paragraph 41 is met."