But if you can tell me what service you are using, I can help you estimate the arrival time.
I think you sent it on 10 year1October 23rd. If you had confirmed it by airmail or airmail, it should have arrived long ago. It hasn't arrived yet. I think I lost it. If you use Surface, it should still be on the road. But now we are in Beijing, and the delivery is not far away.
Remember to keep the receipt. If you lose it, you can ask Royal Mail for compensation. Next time, if it's something valuable, remember that all tracking is a cloud, and insurance is king.