I was in the same situation a few months ago and chose Meest CA. They have a page specifically for shipping from Canada to the United Kingdom: https://ca.meest.com/services/service/delivery-to-united-kingdom.

I liked that everything was explained clearly, and they even have an online calculator so you can check the estimated shipping cost before booking. That really helped me compare my options.

My shipment arrived safely, and the overall process was smooth from start to finish. They handle both personal packages and larger cargo, so it’s a good option regardless of what you’re sending. I’d definitely recommend taking a look at Meest CA if you’re shipping from Canada to the UK.