Meanwhile - out in the real world....

http://www.southoxon.gov.uk/ccm/support/Main.jsp?MODULE=LicenceDetails&REF=4027&TYPE=Premises

Live music permitted on no more than two days in any one week (Monday to Sunday) One or two musicians playing amplified music. Playing acoustic guitar or saxophone (not both at once) (Indoor)

John King comments:
What possessed a licensing officer to legislate against a musician playing guitar and sax at the same time? If anyone could play both simultaneously they would be committing a criminal offence subject to £20,000 fine of six months in prison, but only in Magoo's, Henley.

Just as importantly - what can be done now to change such unlawful conditions and prevent local Govt employees from imposing them?