There are a lot of great builders and bloggers that have gone before me:
Caterham 420 Detailed Build Blog: Chris Collins started building a 420R in September 2019 and has put together an excellent reference site to augment the Caterham build manuals. He should be finishing his project just as I will be starting mine:
https://caterham420detailedbuildblog.co.uk/about/
2019 Caterham 270R Racing Blog: Daniel French built an R500 in 2014 and his blog documents the build, upgrades and latterly his Caterham Academy racing career. There are a lot of great ‘how to’ articles in here and I particularly like the January 2016 blogs on installing the carbon interior panels:
Purplemeanie: A family build blog covering the assembly of an SV chassis 420R in 2017. A lot of really great detail in here explaining all elements of the build and most recently a section on ECU diagnostics:
https://www.purplemeanie.co.uk
420R SV Build Diary: A great blog from Marcus Adams detailing the build of an SV chassis 420R in 2015 / 16:
Caterham Seven 360R Build Blog: An inspiring father / son build blog of a 360R in 2015 /2016:
http://caterham360rbuildblog.blogspot.com/2015/11/and-so-it-begins.html
Father and Son Caterham 420R Build Blog: A day by day build blog containing some very helpful pictures and narrative:
http://caterham420r.blogspot.com/2015/09/buying-caterham.html
Caterham7 Diaries: A full on build blog of a 420R from 2018. Lots of really good stuff on here. You can also download the CAD files for the ‘Eccles’ wing mirror mounts from this site:
Team420RBuild 