Dripping tap

Hello all,

Need to stop a dripping kitchen tap which is driving my mom slowly mad! Have replaced the cartridge on my own taps before but I have failed at the first hurdle on these one. Can anyone tell me how to remove the 1/4 turn levers on the taps in the attached photos please?

There is no cap to prise off and I cannot find a grubscrew in the lever, only in the back of the stem section. Any help would be very much appreciated.

Thanks and ATB

With no grub screw there are only two possibilities:
1. They just pull off (less likely).
2. The round levers unscrew. Possibly to reveal a hidden grub screw

Finally got to look at this today. Grub screw was under the lever as suggested. Thank you for your help.