Whilst the Blues South under 16s and Scarlets under 16s have already been beaten, by the Dragons and Ospreys respectively, the Blues North and Ospreys are seeking to maintain their successful start to the new campaign.

The North, who were 10-3 winners against the Dragons last week, entertain the Scarlets at Abercwmboi, whilst the Ospreys, who defeated the Scarlets in their opening game, take on Blues South at Llandarcy.

Brad Llewellyn takes over from Jack James as captain of a North side that shows nine changes to the team that pipped the Dragons at a rain-sodden Abercwmboi. The Scarlets are also much changed - only eight players remain from the side beaten by the Ospreys, on home soil, two weeks ago.

At under 18 level, the Blues and Scarlets meet at Parc y Scarlets with both sides having won once aleady this term. The Scarlets, who were outstanding in defeating the Ospreys, will be looking to gain revenge for last season's final defeat by the Blues. Jordan Williams was in excellent touch against the Ospreys and he might, once again, be the key to the home side's hopes of downing last season's champions.

The Scarlets, led by full-back Luke Treharne, make four changes to their side while the Blues make seven alterations to the team that hammered RGC 1404 at Merthyr on August 15.

Without a game last week after their scheduled derby clash with the Dragons at Rodney Parade, was postponed due to heavy rain, the holders will certainly have their work cut out on this occasion.

Blues North under 16s: C Lawrence; O Smyth, S Edwards, G Smith, J Barnett; J Evans, J Harris; D Lewis, N Evans, K Belmont, A Luxton, M Jezalik, J Allen, I Evans, B Llewellyn (capt). Replacements: A Gibbs, J Smedley, A Panniers, J James, S Clarke, J Jones, A Gwynne

Scarlets under 16: J Evans; J Barnes, S Evans, C Woodall, M Davies; J Maynard, I Bowen; B Davies, E Lewis, C Evans, J Helps, A Washbourne, C Randell, W Boyde, L Taylor. Replacements: J Sebastien, T Myhill, L Watling, T Phillips, G Kenniford, G Rees, J Adams

Ospreys under 16: A Rowlands; J Needs, M Burnbell, J Thomas, D Howells; J White, D Brooks; L Jonathan, J Williams, D Owens, T Lewis, R Morgan, B Evans (capt), C Leyshon, C Davies. Replacements: G Stone, M Parmenter, A Williams, L Cox, T Maggs, L Popham, J Anderson, J Seldon, T Williams

Scarlets under 18s: L Treharne (capt); J Randell, D Jenkins, G Owen, A Evans; J Williams, R Williams; B Allsop, T Ball, T Kaijaks, C Marks, D Morgan, S Bennett, D Thomas, J Williams. Replacements: S O'Leary, T Evans, G Davies, C Morris, O Powell, C Lloyd, N Setaro

Blues under 18s: C Allen; H Robinson, R Evans, T Pascoe, O Jenkins; R Patchell, J Raikes; T Davies, J Dando, B Thyer, B Roach, C Lacey, J Sienawski, E Jenkins (capt), L Young. Replacements: J Hopkins, C Lewis, L Connolly, S Pring, L O'Brien, G Thomas, J Phillips

Fixtures (kick-off 7.15pm)

Under 16

Blues North v Scarlets (Abercwmboi)

Ospreys v Blues South (Llandarcy Academy)

Under 18

Scarlets v Blues (Parc y Scarlets)