Valuation of shares question

Hello fellow accountants,

I've just read a recent article in Indicator about turning a lease into a tax-allowable loss by transferring the lease into a company and basing the value of the shares on the remaining value of the lease.

Good stuff and I've researched it to death. Fantastic little tax planning tool.

However, what I am not clear on is the mechanics of valuing shares. Would somebody mind briefly explaining how this is done and what sort of relevant yearly working papers would need to be drafted along with any relevant companies house forms? Sorry to ask so much but I am genuinely interested. In my defense I'm only 24 and still learning!

Many thanks.