Certain nationals are required to register with the police. On entering the UK, you may have had your passport stamped with the words, 'the holder is required to register at once with the police'. If you are required to register, you must do so within seven days of arrival in Britain. The fee is £34.00 and to register, you should go to:
323 Borough High Street,
London, SE1 1JL
Telephone Number:020 7230 1286
More information can be found on the Visa and International section of UniHub.