Price of a pint of beer 9 1/2 old pence (milk 3 pence a pint)

http://www.telegraph.co.uk/finance/personalfinance/interest-rates/3392660/Interest-rates-1955-when-interest-rates-were-3-per-cent-and-Grace-Archer-died-in-a-fire.html

Maybe you could try contacting a museum that displays life in the 50s and ask them if they can direct you to any historical information about costs of everyday items.

Eg. This one in Bristol  http://news.bbc.co.uk/local/bristol/hi/people_and_places/history/newsid_8376000/8376893.stm