Scottish athlete Katherine Grainger won the double sculls with Anna Watkins at London 2012.
Speaking ahead of today's victory parade in Scotland, she said: "I don't get back to Glasgow enough. it's my home town, it's lovely to come home and celebrate with the people who have supported us all along."
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The prince laid a floral wreath at one of a group of metal crosses near Wellington Arch in central London.
The group, which also owns Premier Inn, said on Wednesday that it will pursue a ‘demerger of Costa’.
The showers will become more frequent as the day goes on, giving some heavy downpours in places during the afternoon.