Lots of factors can affect your broadband speed. Some you can control, others you can't. If your broadband seems slower than expected, it could be due to one of these.
Outside your home
How close you live to your local telephone exchange: The closer your phone line is to the exchange, the quicker the connection usually is. If you live further away your actual speed may be reduced to ensure quality of signal is maintained.
Time of day: Unsurprisingly, more people go online during the peak time of 6pm-11pm than any other, so you may find download speeds slower during these hours.
Phone line faults: If the local phone line in your area has been damaged, this can cause problems with your broadband. If you hear noise on your phone line or no dial tone then it’s likely you’ll have problems with your broadband too.
Bad weather: Adverse weather conditions like heavy rain, flooding and snow can damage cables and cause short circuits. Damage like this can slow your connection down or cut it out completely.
Busy websites: If a website is particularly busy and everyone is trying to view it at the same time, then you might find it loads slower than usual. There’s not much you can do about this except to keep trying or try again later.
Inside of your home
The length and quality of your home phone wiring: You'll usually get better broadband speeds if the wiring from the master socket to your router is shorter and of good quality.
Your master phone socket: Always connect your router to your master socket where your broadband connection is the strongest for the fastest possible speeds. The master socket is usually in your hallway and is the point where your phone line enters your home
If your Wi-Fi router is connected to one of your extension sockets instead of your master socket, your broadband signal will be forced to travel further and you'll likely get slower broadband speeds.
Wi-Fi router location:
Micro filters: these filter your phone line and allows your broadband and telephone to work at the same time. If they are not correctly installed you will not get optimal speeds and your connection may be intermittent.
Your devices: As a general rule, smaller, cheaper or older devices are less likely to deliver good broadband speeds.
How many people/devices use your broadband connection at once: If several devices use your broadband at once they can slow your connection. Try switching off any devices that don’t need to be used.
Electrical interference from other devices: Electrical equipment like mobile phones with Bluetooth, microwaves and cordless phones and baby monitors can interfere with your wireless signal.
Wireless and wired connection: Connecting to a router wirelessly will be slightly slower than connecting to it with a physical wire.