Three flood warnings are in place in Wales this morning.
- Monmouthshire: River Wye at Monmouth, undefended areas
- Pembrokeshire: Tenby
- Wrexham, Cheshire: Lower Dee Valley from Llangollen to Chester
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More than a thousand riders will be taking part in a series of events in and around the town.
Some warm spells of sunshine will develop, although scattered heavy and thundery showers are also expected during the afternoon.
A yellow 'be aware' warning has been issued by the Met Office for much of Wales.