Β£100 is roughly the price point for mid-range bone conducting, outside-the-ear headphones. These rest against the bone next to the ear instead of inside the ear itself. You can get lower end options for more like Β£45
I cannot recommend these strongly enough!
- Your ear canal is open to the air, not plugged up for hours
- You can still hear your environment, great for biking/walking/running/not getting snuck up on