Balls for Racket-Ball

There are two main balls used in the U.K. which are

Dunlop

This is probably used most often as it is stocked by a greater number of dealers and clubs.

Karakal

This is one alternative brand. It is available in either blue or black. It is slightly slower than the Dunlop ball.

This ball is available from Racquet Technic in the United Kingdom.

There are other brands available, but I do not have any information about these.