MATT WILLIAMS continues this week with the experiment of former Irish scrumhalf Isaac Boss playing at fullback following his contribution from that position last week in Galway, writes Johnny Watterson. Ulster hooker Nigel Brady will captain the side while Rory Best is out with a thigh injury.

Declan Fitzpatrick starts at tighthead prop as BJ Botha sits it out with a neck injury, while Ian Whitten starts at inside centre, allowing Paddy Wallace to recover from a head injury. Matt McCullough is back into the side and he starts at blindside flanker, while Ulster’s player of the season and Lions tourist, Stephen Ferris, is rested ahead of the tour to South Africa.

SCARLETS: D Evans; D Daniel, N Reynolds, R Higgit, L Williams; R Priestland, M Roberts; I Thomas, K Owens, K Meeuws, L Reed, D Gtray, R McCusker, J Edwards, D Lyons (capt). Replacements: P John, E Phillips, A Shingler, S Easterby, J Turnbull, G Cattle, C Thomas.

ULSTER: I Boss; T Nagusa, D Vace, I Whitten, S Danielli; N O’Connor, C Willis; B Young, N Brady (Capt), D Fitzpatrick, E O’Donoghue, R Caldwell, M McCullough, C Henry, R Diack. Replacements: N Hanna, J Fitzpatrick, C Del Fava, W Faloon, I Humphreys, M McCrea, C Schifcofske.

Referee: N Paterson (SRU)

Verdict: Ulster.