KPMG have advice on assets held by outsiders for the conduct of business viz:
There are special provisions where an individual holds an asset which is used for the purposes of a trade carried on by his personal company. Section 157 provides that a gain accruing to an individual on the disposal of the old assets may be rolled over into the cost of new assets where both the old and new assets are used for the purposes of a qualifying activity carried on by the claimant's personal company and both old and new assets are used only by the same personal company. The company must be the claimant’s personal company both at the time of disposal of the old asset and the acquisition of the new asset. A personal company for these purposes is defined as one where the taxpayer has 5% or more of the voting rights. There is no requirement for the claimant to be an employee or officer of the company. There is no restriction where the company pays rent to the shareholder.'
So that covers the problem quite simply which was a slight worry towards the end of my original answer..