I'm going to have to disagree with you a little there ...

In Jacks situation, we are aware that conditions can change - if he's south coast UK and northern france, then that includes CI's where fog is a common occurrence ...

Whilst Jack will (I hope) do everything in his power to avoid the need for a LR, events can get out of control - in which case I think the family would prefer both options (I certainly would).

The OP was asking about UK Coastal sailing ... which I took to exclude trips across any of the channels ...