what is the average price of bitcoin in september 2013 pounds sterling

The average closing price for Bitcoin (BTC) in terms of GBP in September 2013 was 81.90. It was down 8% for the month.

DATE OPEN HIGH LOW CLOSE
September 30 2013
85.09
82.18
September 27 2013
80.38
82.91
September 26 2013
79.73
80.05
September 25 2013
79.59
79.75
September 24 2013
78.57
79.53
September 23 2013
80.48
78.52
September 20 2013
80.90
79.38
September 19 2013
81.36
80.88
September 18 2013
82.82
81.44
September 17 2013
82.78
82.80
September 16 2013
82.44
82.87
September 13 2013
84.04
85.04
September 12 2013
85.68
84.24
September 11 2013
80.01
85.52
September 10 2013
81.08
80.03
September 09 2013
77.94
81.00
September 06 2013
81.13
76.24
September 05 2013
81.12
81.10
September 04 2013
87.74
81.12
September 03 2013
87.24
87.92
September 02 2013
89.37
87.40
Daily pricing data for Bitcoin dates back to 7/14/2010, and may be incomplete.