Thanks! I read the link but not sure how to apply it here, can anyone provide an example for my scenario above?

How do I get a safe evaluation of my solo SaaS? How does my new company buying the SaaS with money or shares work when the company is starting with zero money in it? How much can I look to save/make by doing this and what risk is there of HMRC disagreeing? Is it really stupid to transfer the SaaS without any 'sell' value?

This area seems like a really big deal to me and I can imagine some accountants not doing it correctly.