Hi
Read immigration rule for general visitor here as well.
Part 2 - Persons seeking to enter or remain in the United Kingdom for visits
Immigration rules
Visitors
Requirements for leave to enter as a general visitor
40. For the purposes of paragraphs 41-46 a general visitor includes a person living and working outside the United Kingdom who comes to the United Kingdom as a tourist. A person seeking leave to enter the United Kingdom as a Business Visitor, which includes Academic Visitors, must meet the requirements of paragraph 46G. A person seeking entry as a Sports Visitor must meet the requirements of paragraph 46M.
A person seeking entry as an Entertainer Visitor must meet the requirements of paragraph 46S.
A visitor seeking leave to enter for the purposes of marriage or to enter into a civil partnership must meet the requirements of paragraph 56D.
41. The requirements to be met by a person seeking leave to enter the United Kingdom as a general visitor are that he:
(i) is genuinely seeking entry as a general visitor for a limited period as stated by him, not exceeding 6 months or not exceeding 12 months in the case of a person seeking entry to accompany an academic visitor, provided in the latter case the visitor accompanying the academic visitor has entry clearance; and
(ii) intends to leave the United Kingdom at the end of the period of the visit as stated by him; and
(iii) does not intend to take employment in the United Kingdom; and
(iv) does not intend to produce goods or provide services within the United Kingdom, including the selling of goods or services direct to members of the public; and
(v) does not intend to undertake a course of study; and
(vi) will maintain and accommodate himself and any dependants adequately out of resources available to him without recourse to public funds or taking employment; or will, with any dependants, be maintained and accommodated adequately by relatives or friends; and
(vii) can meet the cost of the return or onward journey.; and
(viii) is not a child under the age of 18.
(ix) does not intend to do any of the activities provided for in paragraphs 46G (iii), 46M (iii) or 46S (iii);
and
(x) does not, during his visit, intend to marry or form a civil partnership, or to give notice of marriage or civil partnership; and
(xi) does not intend to receive private medical treatment during his visit; and
(xii) is not in transit to a country outside the common travel area.
Leave to enter as a general visitor
42. A person seeking leave to enter to the United Kingdom as a general visitor may be admitted for a period not exceeding 6 months, or not exceeding 12 months in the case of a person accompanying an academic visitor, subject to a condition prohibiting employment, provided the Immigration Officer is satisfied that each of the requirements of paragraph 41 is met.
Refusal of leave to enter as a general visitor
43. Leave to enter as a general visitor is to be refused if the Immigration Officer is not satisfied that each of the requirements of paragraph 41 is met.
Requirements for an extension of stay as a general visitor
44. Six months is the maximum permitted leave which may be granted to a general visitor. The requirements for an extension of stay as a general visitor are that the applicant:
(i) meets the requirements of paragraph 41 (ii)-(vii) and (ix)-(xii); and
(ii) has not already spent, or would not as a result of an extension of stay spend, more than 6 months in total in the United Kingdom or not more than 12 months in the case of a person accompanying an academic visitor as a general visitor. Any periods spent as a child visitor are to be counted as a period spent as a general visitor; and
(iii) has, or was last granted, entry clearance, leave to enter or leave to remain as a general visitor or as a child visitor.
Extension of stay as a general visitor
45. An extension of stay as a general visitor may be granted, subject to a condition prohibiting employment, provided the Secretary of State is satisfied that each of the requirements of paragraph 44 is met.
Refusal of extension of stay as a general visitor
46. An extension of stay as a general visitor is to be refused if the Secretary of State is not satisfied that each of the requirements of paragraph 44 is met
For more detail see below link
http://www.ukba.homeoffice.gov.uk/polic ... les/part2/
UK_Banned_Member