I know that more companies are insisting on the using of AGR over 3T and this is something I am exploring. However, what I'd like to know is some of the contradiction companies who are pushing this standard so I am able to cite the examples. Andrew

You are not alone Graham.

From the PASMA Website, via Google ... https://www.pasma.co.uk/faqs/3t-and-agr/ 3T and AGR (Advance Guardrail) What is the 3T method and what is Advance Guard Rail (AGR)? 3T stands for Through the Trap and it is one of two processes used for fall protection on mobile towers recommended by PASMA and the HSE. The other process is the use of Advance Guard Rail (AGR) systems. If you don’t know what the 3T method is or how Advance Guard Rail (AGR) systems work and you are involved in the building of mobile towers or you have responsibilities for the use of mobile towers, then you need to get PASMA trained! Should you use the smallest end frames at the top or bottom of a mobile tower? If you are building a mobile tower using the 3T method, always use the smallest frames at the base e.g. start the tower with 2 rung frames at the base followed by 3 rungs frames and then 4 rung frames on top. This will allow you build the tower safely using the 3T method ensuring that the guardrails may be fitted at the correct heights through the build.

Is it offering fall protection or fall provention ?

Thanks to those who have explained what this thread is about. When I first saw it I did a quick online search of two websites about abbreviations. For AGR they offered numerous meanings including Anterior Gastric Receptor, Adaptive Gaussian Representation , Alaska Gold Rush, Annual Growth Rate and Anti-Gas Respirator but, alas, not Advance Guard Rail ! :-(