you may want to have a look at my previous posting on share options and post tax NAV. In summary:
(a) the options are dilutive but not excessively so (a significant proportion are out of the money);
(b) the company no longer qualifies as a business asset for taper relief purposes, so the 10 year taper relief scale applies. The business has to pay 30% on all gains since it is not an investment trust. To convert to a investment trust would require a move to the main market and would be prohibitively expensive. It would also require that the directors were qualified investment professionals, which they are not. There are, however, offshore options which would allow the company to avoid tax on capital gains and these are currently being investigated by the FD and the accountants.