http://www.ukba.homeoffice.gov.uk/sitecontent/newsarticles/2013/october/01-october-rules
http://www.ukba.homeoffice.gov.uk/policyandlaw/immigrationlaw/immigrationrules/part2/
Permitted study as a general visitor
43A. (1) A person who has been granted leave to enter the United Kingdom under paragraph 42 may undertake a course of study to the extent permitted by this paragraph.
(2) A course of study is permitted under this paragraph if it-
(a) does not exceed 30 days in duration (either alone or taken together with any other course and whether continuous or otherwise); and
(b) is a recreational course; but
(c) is not an English language course.
(3) A course of study is also permitted under this paragraph if it-
(a) does not exceed 30 days in duration (either alone or taken together with any other course and whether continuous or otherwise); and
(b) is provided by an institution which is-
(i) the holder of a Sponsor licence for Tier 4 of the Points-Based System,
(ii) the holder of valid accreditation from Accreditation UK, the Accreditation Body for Language Services (ABLS), the British Accreditation Council (BAC), or the Accreditation Service for International Colleges (ASIC),
(iii) the holder of a valid and satisfactory full institutional inspection, review or audit by the Bridge Schools Inspectorate, the Education and Training Inspectorate, Estyn, Education Scotland, the Independent Schools Inspectorate, Office for Standards in Education, the Quality Assurance Agency for Higher Education, the Schools Inspection Service or the Education and Training Inspectorate Northern Ireland, or
(iv) an overseas higher education institution offering only part of its programmes in the United Kingdom, holding its own national accreditation and offering programmes that are an equivalent level to a United Kingdom degree.
(4) For the purposes of this paragraph a "recreational course" is one which a person undertakes purely for leisure purposes.
UK: New rule: Permission to study as a general visitor.
http://www.ukba.homeoffice.gov.uk/policyandlaw/immigrationlaw/immigrationrules/part2/
Permitted study as a general visitor
43A. (1) A person who has been granted leave to enter the United Kingdom under paragraph 42 may undertake a course of study to the extent permitted by this paragraph.
(2) A course of study is permitted under this paragraph if it-
(a) does not exceed 30 days in duration (either alone or taken together with any other course and whether continuous or otherwise); and
(b) is a recreational course; but
(c) is not an English language course.
(3) A course of study is also permitted under this paragraph if it-
(a) does not exceed 30 days in duration (either alone or taken together with any other course and whether continuous or otherwise); and
(b) is provided by an institution which is-
(i) the holder of a Sponsor licence for Tier 4 of the Points-Based System,
(ii) the holder of valid accreditation from Accreditation UK, the Accreditation Body for Language Services (ABLS), the British Accreditation Council (BAC), or the Accreditation Service for International Colleges (ASIC),
(iii) the holder of a valid and satisfactory full institutional inspection, review or audit by the Bridge Schools Inspectorate, the Education and Training Inspectorate, Estyn, Education Scotland, the Independent Schools Inspectorate, Office for Standards in Education, the Quality Assurance Agency for Higher Education, the Schools Inspection Service or the Education and Training Inspectorate Northern Ireland, or
(iv) an overseas higher education institution offering only part of its programmes in the United Kingdom, holding its own national accreditation and offering programmes that are an equivalent level to a United Kingdom degree.
(4) For the purposes of this paragraph a "recreational course" is one which a person undertakes purely for leisure purposes.