This is a List of squadrons and flotillas of the Royal Navy.
Starting around the time that steam cruisers became popular in the 1870s, the Royal Navy tended to organise such ships into groups called Cruiser Squadrons.
During peacetime the grouping was primarily for administrative purposes, but during war the whole squadron tended to be operated as a unified fighting unit and such units would train in this formation during peace.
The use of Cruiser Squadrons died out as the number of such ships decreased following World War II.
See Pennant number#Flotilla bands Included:[27]