Which cartridge in a Nottingham Analogue?

The Nottingham Interspace tonearm has an effective mass of 11.25 grams. That happens to be the same as the Rega RB-250 for those that may have recommendations with that very popular arm.

I think that when you enter the arena of the "Effectual mass of a tonearm" and its effect on your choices for cartridges, you have clearly left the world of the true novice behind. They (me as well) will not know in all probability exactly what they are losing or gaining with choices so dictated.
I admit that I may wish to undertake an increased interest in such thing but have not gotten most of my analog gear back yet, if it ever comes.

I live in Southern Spain and the nearest Hi Fi shop is 100Km away so I've found a shop in Berlin, Germany who seems really helpful (I'm travelling to berlin later this year anyway). I have assumed that he will know the technical side of things and will provide me with 3 or 4 decent options based on my preferred sound characteristics.
This is their website for anyone who may be interested what they can offer. My question was to try to understand what his options will give me. http://www.phonophono.de/

I think you have got it absolutely right Mechans, Whilst I have an interest in the technicalities and effect of component change, I really just want to listen to my favourite music without worrying about how to squeeze the smallest difference/improvement out of it. I also don't have the money or storage space (or understanding wife for that matter)to be constantly changing components.
The reason my list is so exhaustive is that my phono amp will run MM, low output MC and High output MC so my choice really is unrestricted.Also, given that I've only previously had MM's, I thought I might try a MC, and possibly a low output as I believe from the research I've done they seem to be slightly more. However, I am open to whatever sound best on the turntable.

FWIW, with a tonearm effective mass of 11.25 gms, which is "medium", you have a wide variety of choices. According to theory, a typical high compliance/low output MC cartridge will work fine in that tonearm but probably not super optimally, which, as you say, you don't care about. The good thing about having a tonearm with a lower effective mass than optimum is that you can quite easily increase effective mass by adding a mass to the headshell. We all "just want to listen" to our favorite music.

Audio-Technica AT-33PTG/II 0.3mV MC Cartridge