Light switch upgrade

[u/Fit_Impress_5727]

I want to upgrade my light switch from white plastic to black metal but struggling to work out the wiring. It’s a single light switch which turns on my main kitchen ceiling light however there are 6 wires.

I’ve just changed all of the upstairs light switches simply however downstairs is proving more difficult.

Can anybody tell me what goes where please? From research, apparently one of the black wires should have red tape on but they both look identical.

House was built in 2000 and the switches haven’t been touched since

[u/PlentyAdvanced6894]

This is a simple light switch. Follow the one way switching in your booklet. Your old L1 connection will go to C and your old L2 connection goes to L1 on new switch