Police and Crime Commissioner for South Wales Alun Michael, has announced the appointment of Sophie Howe as Deputy Commissioner and Dave Francis as Assistant Commissioner.
Mr Francis is the Deputy Chief Constable of South Wales Police, while Mrs Howe is a former Labour councillor and special advisor to the Welsh Government.
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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.