Evans kicked five points for Wales

Full-back Non Evans got the scoreboard moving after 14 minutes with a penalty in front of the posts.

Wales continued to dominate and the breakthrough came in the 25th minute with a superb individual try from fly half Naomi Thomas, Evans converting.

Wales are now assured a top-half finish as they prepare to face the powerful French in Pontypridd next Friday.

Spain's best effort came in the final quarter when a 40-metre driving maul was halted just short of the Welsh line.

Touchline runs by substitute winger Philippa Tuttiett and by Evans just failed to produce a second try in the closing minutes.