Matrimonial Proceedings and Property Act 1970

37 Contributions by spouse in money or money's worth to the improvement of property

It is hereby declared that where a husband or wife contributes in money or money's worth to the improvement of real or personal property in which or in the proceeds of sale of which either or both of them has or have a beneficial interest, the husband or wife so contributing shall, if the contribution is of a substantial nature and subject to any agreement between them to the contrary express or implied, be treated as having then acquired by virtue of his or her contribution a share or an enlarged share, as the case may be, in that beneficial interest of such an extent as may have been then agreed or, in default of such agreement, as may seem in all the circumstances just to any court before which the question of the existence or extent of the beneficial interest of the husband or wife arises (whether in proceedings between them or in any other proceedings).