Soldiers have been stationed outside AWE Aldermaston & Burghfield, where Britain's nuclear deterrent is maintained.
Road Closures For Thames Valley Races
Drivers are being warned about dozens of road closures across the Thames Valley today - as runners prepare to take part in two major events.
Maidenhead's holding a half marathon from 9.30am - while the Challenge Henley Triathlon's also taking place later.
Both events are causing road closures.
The main routes affected in Maidenhead are:
- St Ives Road, High Street and Queen Street, between Broadway and High street, where closures and restrictions will be in place between 7am and 2.30pm.
- Roads will be closed between 7am and 10.30am at Broadway and Queen Street (between Broadway and Grenfell Road), York Road, Park Street, Bridge Avenue, Crown Lane and Fotherby Court.
- Forlease Road and connection roads, including the A4, will be closed 8am to 10.30am.
The Royal Borough of Windsor and Maidenhead Council say diversions will be in place - and they're hoping for traffic delays to be kept to a minimum but drivers are being told to leave extra time for their journeys.
In Henley the following areas are affected by the triathlon:
-Between Bolts Cross and Greys Road
Residents living on the Southern side will access via Greys Road and exit onto the B482 Peppard Hill.
Residents on the Northern side will access via the Eastern end of Rock Lane and exit onto Greys Road
-Timbers Lane between A4130 and Three Corner Common
Between Nuffield Hill and the A4130 residents on the north side of the Road will enter from Nuffield Hill and exit onto the A4130. On the Southern side they will enter from the A4130 and exit into Nuffield Hill.
Between Nuffield Hill and Kits Lane residents on the eastern side of the road will access via Nuffield Hill and leave via Kits lane. On the western side they will leave and enter via Nuffield Hill.
Access to Nettlebed will be from the east, A4130 Gangsdown Hill. Between Huntercombe End and Timbers Lane there will be two cone lines. The northern most lane will be for cars entering Nettlebed. They will be crossed over the cycle route at the bottom of Huntercombe End via traffic management operatives with Stop/Go boards. From this point, vehicles will be able to travel without escort, keeping to the left of the centre cone line as far as the centre of Nettlebed. Marshals will be on hand to assist vehicles needing to cross the cycle route to gain access for driveways.
Vehicles wishing to leave Nettlebed should proceed north along B481 where from the junction with Huntercombe End, a moto will escort vehicles along the route as far as Britwell Hill
- Nettlebed to Watlington turn point
Residents on the western side of the road below Britwell Hill will access via Nettlebed and leave at Britwell Hill
Residents on the eastern side of the road south of the B480 Patemore Lane will be able to enter via Patemore Lane and leave via Britwell Hill
- Howe Hill
Residents on both sides of the road will be able to enter From Watlington and leave onto Patemore Lane.
Police say two men, arrested after reports of people acting suspiciously near barracks in Windsor, have no links to terrorism
Two men have been arrested after "acting suspiciously'' outside a barracks.
The UK's terror threat level's been raised to the highest possible. Here's what it means for the Thames Valley.
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