https://www.citizensadvice.org.uk/cymraeg/Gwaith/Ymddiswyddo/eich-cyfnod-rhybudd-os-ydych-yn-ymddiswyddo/
Gwiriwch eich rhybudd os ydych yn ymddiswyddo - Cyngor ar Bopeth
Find out how much notice you need to give when resigning and how to negotiate a reduced notice. You can also check what happens to your holiday entitlement.
eichosynar