I will be asking the conveyancing solicitor to clarify but they are the ones confusing me 
I'm about to buy a house that has a conservatory built on. The sellers did not build it, it was there when they moved in approximately 6 years ago.
The solicitor has stated there are no Building Regulations Approval paperwork and advise me not to proceed without it, nor get an indemnity for it. However, from my basic google search, it seems conservatories do not need either planning permission or building regs if under 30 square metres and have a separate heating source (which this has).
So does anyone know which is true? Normally I would follow my solicitors advice but it seems to be at odds to multiple web pages stating the opposite. Does anyone know if it does actually require BR?
TIA