Usually c. £10M worth. The higher the share price, the fewer they need to issue, which is why they always try to boost the price just before a share issue.
Just for the record, 2p is not 'under a penny' (and the price a year ago was ~20p)
# of Trades 24
Vol Sold 628,897
Vol Bought 0
52 Week High 25.50p
52 Week High Date 07-Mar-13
52 Week Low 2.00p
52 Week Low Date 17-Jul-13