Can I add ratings to a NNPL? I have been speaking to a couple of local flying schools. Originally, I was going to train on a Piper Tomahawk to obtain an LAPL. But after explaining to one of them my goals, (just flying for fun, no career aspirations) they suggested an NPPL would be more appropriate.

They explained that it would cost about half the amount (in money and time) to obtain and that their Ikarus C72s are safer, easier and more fun to fly anyway.

I am on board with all of this but I think I would like the freedom to fly in IMC in the future, they said I can add an instrument rating to an NPPL and that I can convert to an LAPL in the future if I want to anyway, is this the case? I have looked on the CAA website, but it's all a bit confusing right now.
Available Ratings:


  You can add class ratings to the NPPL to allow you to fly microlights, self-launching motorgliders (SLMGs) and simple single-engine aeroplanes (SSEAs).


The above are the only available ratings for an an NPPL. An NPPL (and LAPL) is strictly a VFR license, therefore you could not get rated for IMC. However, you can continue your training to receive your PPL, at which point you could recieve a rating for IMC, which would be your IR(R), or Instrument Rating Restricted. 

Most flight instructors will provide basic IMC training just in case you find yourself in a bad situation, which can happen to even the most cautious pilots.