Welcome Daryl! Yes it should lock in, you may need to replace it but it is pretty easy to get at to see if something is caught up in it. There are 4 screws holding in the bottom of the steering column, if you remove them you can take the top and bottom half's apart to get a look. DAP, Roversnoth, Northeast British parts or Atlantic British should have the switch if you need it.
Don't forget to
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first then ask questions later! The loose nut behind the wheel