Quick question re router IP address

[#1]

I would like to log in to my router to check the speed its seeing but I can't remember the IP address to use, as it has been a good 12 months since I've done this.
Can anyone give me a reminder of what this should be please ?
Ta

[#2]

What is the make of your router?
I suspect it will either be 192.168.0.1 or 192.168.1.1

[#3]

Some also use 192.168.1.254
However, if you open a command prompt (Start>Run then type cmd) and then type ipconfig /all and look for the entry that says "Default Gateway".  The address quoted is the IP address of your router (generally).