A four day protest is expected to begin this morning outside the Government's monitoring centre, GCHQ in Cheltenham.
Police say they may close Hubble Road around the site to deal with the planned protest by the UK Anonymous group. The action is taking place against surveillance of the public by UK and foreign Governments.
Cheltenham Police are asking any residents with access problems to contact them on the day.
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Chillier this evening with largely clear skies.
Mainly dry with sunny spells this afternoon.
A thief who tried to snatch £20 from a disabled teenage girl has been jailed after she fought him off and passers-by pinned him down.