<p>Fore Sul 25 Medi byddaf yn nofio mewn ras milltir yn Llyn Tegid, Bala, am y tro olaf eleni, a hynny i godi arian i Diabetes UK Cymru. Byddwn yn hynod ddiolchgar am unrhyw nawdd y gallwch ei gyfrannu i'r achos da hwn &ndash; a chofiwch lenwi'r manylion Rhodd Cymorth os ydych yn talu treth, fel y gall yr elusen hawlio 25c arall am bob &pound;1. Diolch o galon!</p> <p>On Sunday 25 September I will be taking part in Diabetes UK Cymru's one-mile swim at Llyn Tegid, Bala, to raise funds to support this charity's important work. This will be my last organised open-water swim this year, and I'd be very grateful for any sponsorship &ndash; please remember to fill in the Gift Aid details if you're a taxpayer, so that the charity can claim back an extra 25p for every &pound;1. Many thanks!</p>