Close Proximity Crewing, which is voluntary, not compulsory, require firefighters to be on duty at the relevant station for 11 hours between 8am and 7pm, immediately followed by 13 hours on call from 7pm to 8am. (The European Court of Justice has previously ruled that time on call counts under the regulations.) This is repeated three times, before the firefighters are entitled to four days off. Several of these shifts per month had to be undertaken by the firefighters at the four stations.