Plenty of people here with experience of tax implications of share options, it's not that hard to handle this yourself (especially if you are accustomed to doing your own tax returns anyway), in the event that you have difficulty finding a suitable advisor.
Basically, I think the position is that tax is payable on the "benefit in kind" value of the options, i.e. the difference between the market value and the option price at the time of exercising the option. With a direct stock grant, tax is payable on the entire value of the grant at your marginal tax rate.
Others here may be more specific if you care to post the details.