Another ceiling rose replacement!

Hi all. Apologies I can see this type of question has been asked a few times but I still need help as an absolute novice! I am planning to replace the rose with a modern (metal) light. I have added a pic of the current configuration in place and the connector available inside the new light. I have read up a bit and understand the red and black is old colours (see other pic nicked from web as my reference) and I think I understand that I have a feed in a feed out and a switched live (ps it’s a dimmer switch if that matters). My query is that I don’t understand how to connect old and new given the connector block inside the new light. Should I be buying some kind of multi block similar together one in the old rose and then linking this to the connector block in the new light? Also I can see there is no sheath denoting the live switch wire but assume it is the black one going into Live? And does it matter anyway --- long as I remap it to similar block in same way as currently configured ensuring power is off throughout? Thanks in advance for any guidance. Keen to do it myself but will accept defeat if told to not be an idiot and get a sparky in. ?. Cheers. Den. Definitely a homeowner/DIYer!
 

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Old dimmers just aren’t designed for such a low power load such as LED lamps.
A traditional dimmer simply increase or decreases the voltage going to a filament lamp, thus making it dimmer or brighter.
LED lamps are designed to only work at mains voltage, (sometimes a range, say between 120 and 230v)
Feeding less than this into it by way of a dimmer can cause the LED to flash, buzz, or not work at all.

Can you change the dimmer to a regular switch?
 
Old dimmers just aren’t designed for such a low power load such as LED lamps.
A traditional dimmer simply increase or decreases the voltage going to a filament lamp, thus making it dimmer or brighter.
LED lamps are designed to only work at mains voltage, (sometimes a range, say between 120 and 230v)
Feeding less than this into it by way of a dimmer can cause the LED to flash, buzz, or not work at all.

Can you change the dimmer to a regular switch?
absolutely. Should that be a simple switch (no pun intended!) from the dimmer to a generic on/off switch, from a wiring connections point or view?
 
You can get dimmers intended for LED dimmable bulbs, but even then they sometimes need configuring to get the best performance and/or don't play well with some types of LED bulb.

I have had reasonable success with theses which are much like a traditional filament dimmer:
Ok thanks for that. I think I’ll just swap the dimmer switch for a basic switch. ?
 

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