6/4/2011
Budget changes for Individuals – Personal Allowance, National Insurance, Capital Gains & Child Benefit
6/4/2010
Introduction of electronic payment for PAYE
http://www.hmrc.gov.uk/paye/file-or-pay/payments/deadlines.htm

http://www.hmrc.gov.uk/paye/file-or-pay/payments/deadlines.htm
