If you use assistive technology (such as a screen reader) and need a
version of this document in a more accessible format, please email email@example.com.
Please tell us what format you need. It will help us if you say what assistive technology you use.
Please note MGN 453 will be replaced by MGN 580 on 1st January 2020
masters and officers of ships
service providers of fire retardant treatment products.