Thank Geezer, it's rather complex as I live in the area, the a/c with 2 pax in it will be staying overnight and picking me up outbound on a jolly (arriving after 6pm) and dropping me off on the way back.
Even though driving to Compton or Sarum is not a hassle for me I think the insurance of the ILS is worth paying the handling at this time of the year.
I'll give Bournemouth Handling a call tomorrow to see how much it'll be.