There are two classes of licence needed for forklift related work.
Forklift truck - LF
The LF high risk work licence class allows you to use forklift trucks, but does not include order-picking forklift trucks (see below).
A forklift truck is a powered industrial truck equipped with a mast and an elevating load carriage which has a pair of fork arms attached (that can be raised 900 mm or more above the ground) or other load holding attachment.
Order-picking forklift truck - LO
To operate an order-picking forklift truck you need an LO high risk work licence.
An order-picking forklift truck has the operator's control as part of the load carriage/lifting media and lifts with it. Order-picking forklift trucks are generally referred to as "stock pickers". They can be fitted with a platform extension for use in furniture warehouses, or can be a turret truck in narrow aisle warehouses.