n-base.org.uk
Lastly, are the doors offered by the company Secure by Design? Secure by Design doors have been thoroughly tested to ensure they provide the best security, with no vulnerabilities. – see more here: https://www.conservatorypro.co.uk/large-conservatories/
Our advice is to get the professional over to do a survey and discuss design options – in fact, we recommend you talk to at least 3 or 4 different companies and then review & compare what you have learnt. A good place to start is here https://www.localconservatoryprices.co.uk/