Figures from trade body the Finance and Leasing Association (FLA) for May saw £108m lent through 2,378 transactions.
Both these totals were up 22 per cent and 23 per cent respectively on the same month last year, and a repeat of the gains seen in April.
The growth took the total lent over the last 12 months to £1.15bn from 25,670 transactions – gains of 12 per cent and 16 per cent respectively.
FLA head of consumer and mortgage finance Fiona Hoyle, said: “The second charge mortgage market remained buoyant in May.”
The overall consumer finance sector fell by two per cent to £8.87bn, with credit card and personal loan volumes slipping by five per cent and car finance by one per cent.
Retail store and online credit business rose by two per cent.