You can find out more about the British and International standards that are relevant to the UK construction industry here (Including Euro codes):
BSI Global Construction Industry Page
Or click here to download a handy PDF
Construction Brochure 2010.pdf
The main standard for technical drawing is BS 8888 – You can find out more here:
BS 8888:2008 Technical product specification
If you want to find out more about Building Regulations – you can see more on the www.planningportal.gov.uk site
Building Regulations – Approved Documents