What are the styles of the different drama schools in the UK?

I know RADA and LAMDA are categorized as posh, but what does that actually mean? What is the training like there, and how does all the training at all the different schools differ? If anyone could tell what they think of Guildhall, Bristol Old Vic, Central... What specifically are each of known for/ how do they train you? Any help would be greatly appreciated, Thank you.