The Office for Budget Responsibility was created in 2010 to provide independent and authoritative analysis of the UK’s public finances. On its website you can find the economic outlook for the UK.
www.obr.uk/about-the-obr/what-we-do/

There is plenty of economic data here at the Office for National Statistics
www.ons.gov.uk

What is inflation?
Bank of England
http://www.youtube.com/watch?v=APqGR9s2Ywg