sm_jamieson wrote:
I have a gas hob to be fitted in the worktop of a standard fitted
kitchen with laminate worktop. Underneath is a 3-draw cabinet with
60mm pipe space behind.
The connection from the 22mm supply will be 15mm copper rising
vertically behind the unit in the pipe space, a right-angle elbow
into the cabinet and copper running just below the worktop for an
inch or two, then a 15mm x 1/2" iron elbow connecting to male bsp
taper on the hob.

What is the usual procedure to make the connection, since there is no
access behind the cabinet when the worktop and hob is being fitted ?

There's only a couple of inches in which to make the connection below
the worktop, so it seems that the pipe would have to be positioned
very accurately before the units are fixed in place.

Just use a rubber hose