Presentation College, Bray bravely defended a flimsy two-point lead for most of the second half yesterday to win a place in the quarter-finals.
St Andrew's dominated the forward tussles, the Bray half-backs and three-quarters eventually called the tune.
The killing blow came from a Killian Cassoni try midway through the second half. The move started with a fine break by outstanding number eight Luke Mantle, who led his back row superbly.
St Andrew's star player Paul Devlin scored a try in each half, and his front-row partners, Ian Pearson and Luke Woods, kept Pres contained in the tight.
The much younger Pres side led 10-8 at half-time after their captain Alex O'Sullivan had kicked a penalty and had converted a superb try from winger Noel Hall.
PRESENTATION COLLEGE, BRAY: K Cassoni; S King, S Greenan, K Flood, N Hall; S Dempsey, D Flynn; S McGuigan, J Moore, A O'Sullivan (capt), J Chambers, A Tew, S Dutton, J Harris-Wright, L Mantle.
ST ANDREW'S: D Kenning; P Ashley, K Waters, S Prentice, P Hamilton; N Lysaght, W Kilmartin; P Devlin, E Pearson, L Woods, C Nolan, D Ruth, G Roe, S Maybury, M Conway (capt).
