Bristol's Mako Vunipola scored two tries as England under-18s started their tour of Argentina with a win.

England came from behind to beat Tucuman under-18s 40-24, to the satisfaction of coach John Fletcher.

"This is the first rugby these lads have had in 12 weeks and they put on a good performance," he told RFU.com.

Leicester Tiger's Andy Forsyth also touched down twice, in the first of three warm-up games before a one-off test against Argentina under-18s.