Set of at 10 in icy foggy conditions for prearranged meet with mates had rode about half a mile and already had a slip.received. text from mate for slipped over on his drive .So ride abandoned .any way after two hours fog began to lift so time for second attempt. Left home at 1230 in fog rode 4 miles to meeting point where it was lovely and sunny and 10 degrees warmer nice 15 mile loop around swithland and wood house with a bit of climbing mate was riding his new crosser bike and first time in clipped pedals (no clipped in moments ). After leaving mate I headed home and decided to attempt warren hill ,a hill I'd only attempted once before and failed to make it up in one go must be getting fitter as this time straight up non stop any dropped into newtown linford and the fog returned and the temp dropped so rode back home in thick fog strange thing this weather.