Bathroom extractor fan. What am I missing?

[Capt Bravz]

I'm trying to replace the extractor fan unit in my bathroom ceiling.
The current one works fine, comes on with the lights and then runs on for about 5 mins afterwards when the lights are turned off. I'm replacing it because its just getting a bit noisy and I have purchased a 'quiet' version.

Units are a straight swap physically in the ceiling but the old one runs off two wires, one brown, one blue.
The new unit has points for 3 wires. N, L, and S/L

No combination of wiring has got the new unit to work whatsoever.
What is the elephant in the room please?

[Capt Bravz]

oldnbold said:

Are you sure that your old unit is not a 12V one. I made this simple school boy error a couple of months ago.

Ah...
Thank you. Yes. Old one is 12v, new one is 230v.
Now I know what the issue is how can/do I solve it or is it the case I need to buy a replacement 'quiet' 12v model?

[Capt Bravz]

Progress.
Been up into the loft, traced the wires back from the fan to a grey box labelled 'transformer timer unit' with a handy dial set to 5 mins.
Removing this will give me the 230v needed to make my new fan work or am I about to blow my roof off?

[Capt Bravz]

Yep I think that's gonna be the way to go for me too. My fan is right above the bath/shower combi so best not to have 230v lurking around.
Many thanks for your help!