Sch 2 para 13
(1) Any change to or extension of development of a description listed in Schedule 1 to these Regulations (other than a change or extension falling within paragraph 21 of that Schedule) or in paragraphs 1 to 12 of this Schedule, where that development is already authorised, executed or in the process of being executed, and the change or extension may have significant adverse effects on the environment; (2) development of a description mentioned in Schedule 1 to these Regulations undertaken exclusively or mainly for the development and testing of new methods or products and not used for more than two years.