Arweinydd y tŷ, mae gen i ddau gwestiwn. Yn gyntaf, yfory rwy'n hwyluso cyfarfod yn y Senedd o grŵp Goroeswyr Triniaethau Rhwyll Cymru, a byddai'n ddefnyddiol cael yr wybodaeth ddiweddaraf gan Lywodraeth Cymru am y grŵp gweithredu dan gyfarwyddyd gweinidogion a gyhoeddwyd gan Ysgrifennydd y Cabinet ar 8 Mai, dan gadeiryddiaeth Tracy Myhill. Yn ail, arweinydd y tŷ, a wnewch chi egluro a yw canllawiau Llywodraeth Cymru ar wisgo gwisg ysgol mewn ysgolion uwchradd wedi eu diweddaru i ymateb i'r tywydd poeth hwn? Wrth i'r tymheredd gyrraedd dros 30 gradd yn ystod yr wythnos ddiwethaf, rwy'n ymwybodol bod rhai ysgolion yn caniatáu i ddisgyblion wisgo trowsus byr - bechgyn a merched - os yw hynny'n well gan ddisgyblion a rhieni, ond mae ysgolion eraill nad ydynt yn gwneud hyn.

Leader of the house, I've got two questions. First, tomorrow I'm facilitating a meeting in the Senedd of the Welsh Mesh Survivors group, and it would be helpful to have an update from the Welsh Government on the ministerially directed implementation group announced by the Cabinet Secretary on 8 May, chaired by Tracy Myhill. Secondly, leader of the house, can you clarify whether the Welsh Government's guidance on the wearing of school uniforms in secondary schools has been updated to respond to these hot weather conditions? With temperatures reaching over 30 degrees over the past week, I'm aware that there are some schools allowing pupils to wear shorts - that's both girls and boys - if preferred by pupils and parents, whilst others are not.

Rydw i'n galw nawr ar Mark Isherwood i ofyn yr ail gwestiwn brys.

I now call on Mark Isherwood to ask the second urgent question.

Mae'r her yna, ond mae her hefyd yn y newid yn y demographic, achos mi fuaswn i'n tybio bod canran fawr o'r 16 y cant yna o grŵp oedran dros ryw oedran penodol - mi fuaswn i'n tybio. A oes gennych chi ffigurau ar hynny?

That is a challenge, but there's also a challenge in the demographic change, because I would suspect that a large percentage of that 16 per cent is in the age group that's over a certain age - I would suspect. Do you have figures on that?

Mae ef wedi cyfeirio at ddyraniad o £13.1 miliwn i Betsi Cadwaladr a'r cymorth ar gyfer datblygu gofal heb ei drefnu cynaliadwy - £1.5 miliwn dros ddwy flynedd. Beth mae hynny'n ei olygu? Wel, ein disgwyliadau, erbyn mis Ebrill 2018, yw y dylai fod gostyngiad i amseroedd atgyfeirio i driniaeth o tua 50 y cant yn y niferoedd sy'n aros dros 36 wythnos, a chynnydd i barhau i mewn i 2018 a 2019, a chamau adfer ariannol a fydd yn arwain at y bwrdd iechyd yn bodloni'r rhagolwg diwygiedig o £36 miliwn ar ddiwedd y flwyddyn, ac yn gwella i mewn i 2018 i 2019.

He has made reference to a £13.1 million allocation to Betsi Cadwaladr and the support for developing sustainable unscheduled care - £1.5 million over two years. What does that mean? Well, our expectations are, by April 2018, that there should be a reduction of referral-to-treatment waiting times by around 50 per cent in the numbers waiting over 36 weeks, and progress to continue into 2018 and 2019, and financial recovery actions to result in the health board meeting the £36 million revised forecast at year end, and improving into 2018 to 2019.