Lord Collins - "I agree, therefore, that authority justifies the conceptual approach of Lord Walker and Lady Hale that, in joint names cases, the common intention to displace the presumption of equality can, in the absence of express agreement be inferred (rather than imputed) from their conduct, and where, in such a case, it is not possible to ascertain or infer what share was intended, each will be entitled to a fair share in the light of the whole course of dealing between them in relation to the property."