Southampton VHF Channels

We have always used Ch08 for our club races. Sunsail and the Warsash Spring Series seem to live on Ch08 all weekend.
 
Just had a very nice reply from the VTS Watch Manager stating that

"Southampton Port will only ever use ch.8 as a last resort when all other dedicated tug channels are being used. The document is incorrect as we cannot hold sole use of that channel."
 
I see from the latest edition of ABP's Yachtsman's Guide To Southampton Water http://www.southamptonvts.co.uk/admin/content/files/PDF_Downloads/Yachtsmans-guide-LowRes.pdf that VHF Ch 8 is not to be used by recreational craft (page 2 headed Port Operation Channels). I always thought that Ch8 was designated a ship-to-ship channel and am surprised that ABP can implement such a restriction.

I don't recognise their authority to make such a restriction. I personally would ignore it. Can anyone put me right?
 
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