Hi ITA show taxes as

Tax: Canadian Goods and Services Tax C$79.82
Tax: US Transportation Tax C$119.73
Tax: US September 11th Security Fee $2.50
Tax: USDA APHIS Fee $5.00
Tax: US Immigration Fee $7.00
Tax: Vancouver Airport Improvement Fee C$15.00
Tax: Canadian Goods and Services Tax C$1.15
Tax: Canadian Air Travelers Security Charge C$7.94
Tax: US Passenger Facility Charge $4.50
Tax: US Flight Segment Tax $7.20

So thats looks like £152 ish