Replacing glands on DUAL-LEVER MONO MIXER KITCHEN TAP

[Andy uk]

Hi, there is a leak on the hot side of the taps under the lever but I can't see any screw to take out, how do you take them apart if there isn't a screw. Any help would be much appreciated.

Thanks

 

[Andy uk]

Sorry its actually the swivel which is leaking, looks like i need new washers for it but unsure where to get them from because not actually sure what type of washer they are.