From the ONS 2009 ASHE - Annual Survey of Hours and Earnings...
Weekly pay - Gross - For full-time employee jobs: United Kingdom, 2009
Mean = £587.30 (~£30,540) ... Median = £488.70 (~£25,400)
Weekly pay - Gross - For all employee jobs: United Kingdom, 2009
Mean = £480.90 (~£25,000) ... Median = £397.30 (~£20,660)
or you can use
Annual pay - Gross - For full-time employee jobs: United Kingdom, 2009
Mean = £31,916 ... Median = £25,816
Annual pay - Gross - For all employee jobs: United Kingdom, 2009
Mean = £21,320 ... Median = £26,470
http://www.statistics...roduct.asp?vlnk=13101
So we can take our pick of these myriad estimates.
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Further to the original question, the LibDems published figures in late 2007 for real term comparison of pension payments against gross average full-time earnings, from which typical levels of earnings can be gleaned for the period 1950 onwards...
http://www.thisismone...d=427290&in_page_id=6