Boots Help Please

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Brrrr! Cold Feet - Recommendations please.
I was out for a ride to London and back to the south coast(Excel London M/C exhibition)and my tootsies were on the cold side, everything else was warm.
I had good kit and heated grips. The boots are ok, come high up the shins.
But after nearly 2 hours riding I had to wriggle my toes to keep the blood flowing. I was wearing Sealskin socks but they are ok if the boots get wet (through).

Thanks.
Keith