The Prison Service says there has also been a disturbance at Rye Hill Prison, near Rugby in Warwickshire, but it was unrelated to the Maidstone Prison incident.
"There was a passive demonstration at HMP Rye Hill where around 60 offenders refused to return to their cells," she said.
"This was peacefully resolved within a few hours."
More top news
The UK economy, boosted by the inclusion of the sex and drugs industry in the calculations, is now the world's fifth largest, but only just.
Wet and windy weather will spread in from the west, turning to snow in places, especially later over the hills.
McDonald's in Japan will resume serving large portions of French fries in January after a labour dispute in the US disrupted supply.