THERMAL UNDIES AND £106 BOOTS

SHE is known for pulling out the stops on overseas tours but the Duchess’s wardrobe will be decidedly casual in Canada, where the sporty couple will be canoeing, fishing and possibly mountain biking. So, no tiaras.

Flunkies have packed clothes for all weathers and plenty of waterproofs for the trip, which includes a flight by seaplane this morning from Victoria Harbour to Vancouver. While today’s engagements require formal day wear, William and Kate will be swapping their designer labels for casual clothing when they visit the Great Bear Rainforest in Bella Bella tomorrow.

The couple have packed their £106-a-pair Hillmaster walking boots, which will be useful when they reach the Yukon provinces of Whitehorse and Carcross, where the mercury will hit zero.

The Duchess’s newly engaged stylist Natasha Archer has packed thermal underwear for the chillier climates (Princess Diana never travelled without hers when she went to Canada). Kate’s £295 possum fur-lined mittens she took skiing in February might come in handy.

‘The advice has been to pack for three seasons, so they will be taking more luggage than usual,’ says a source.

‘The outfits will mostly be practical and casual.’

Kate has packed several hats in honour of Canada’s First Lady, Sophie Trudeau, who is often seen in Chapeaux de la Madeleine cloches.

She is expected to up the glamour at an evening reception tomorrow night at Government House in Victoria. While she will be wearing a showstopping evening gown, she won’t be showcasing a tiara. Kate is understood to have packed the diamond maple brooch the Queen loaned for her debut tour of Canada in 2011, left.