There are several reasons why your fibre broadband speed might be slower than advertised:
1. Distance from the Exchange: The further your home is from the broadband exchange, the slower your speed can be. This is more of a concern for ADSL broadband rather than fibre, but it can still have an impact.
2. Network Congestion: If lots of people in your area are using the internet at the same time, this can slow down your broadband speed. This is often the case during peak times, like evenings and weekends.
3. Wi-Fi Interference: Other wireless devices in your home, such as cordless phones, baby monitors, and microwaves, can interfere with your Wi-Fi signal.
4. Poor Quality Wiring: If the wiring in your home is old or poor quality, this can affect your broadband speed.
5. Too Many Devices: If you have many devices connected to your Wi-Fi at the same time, this can slow down your broadband speed. Each device that's connected to your Wi-Fi is using up some of your bandwidth.
6. Throttling: Some ISPs may slow down your internet speed at peak times to ensure everyone gets a fair share. This is known as traffic management or throttling.
7. Type of Connection: The type of connection you have can impact your speed. For instance, Fibre to the Cabinet (FTTC) is generally slower than Fibre to the Premises (FTTP) as the former still uses a copper line from the cabinet to your home.
Remember, advertised speeds are often the maximum that you could achieve, and not everyone will be able to reach these speeds due to the factors listed above. It's always a good idea to perform an internet speed test to see what speeds you're actually getting.