Help please needed regards kitchen mixer tap !

[comfortably numb]

Hi all,

I'm having problems with an old kitchen mixer tap.......the cold side is dripping from spout so I attempted to remove the brass cartridge to change rubber washers but for some reason after fully unscrewing it doesn't want to come out. Maybe something simple stopping it but I didn't want to force it........you are the experts.......would there be something else holding it in?

Also, I haven't a clue what make the tap is so need help identifying it please!

Lastly I'm hoping I can still get the cartridges for the tap which must be 25 years old at least.......any suggestions where I could purchase these would be gratefully received!
Thank you!

 

[ShaunCorbs]

Wiggle and pull likely the washer has expanded so it won’t come out easily

 

[comfortably numb]

Wiggle and pull likely the washer has expanded so it won’t come out easily

Thanks, I'll give it more welly!