Section 21(3) of the Act states that, in the case of a communication originating outside the United Kingdom, the restriction in section 21(1) applies only if it is capable of having an effect in the United Kingdom. In this respect, it is irrelevant whether the communication has an effect provided it is capable of doing so.
This appears to give a potentially broad jurisdictional scope to section 21. It seems clear that a communication which originates overseas will be capable of having an effect in the United Kingdom if it is an invitation or inducement to engage in investment activity which is communicated to a person in the United Kingdom. It would seem that communications made in other circumstances may also be capable of having an effect in the United Kingdom. However, the exemption for communications to overseas recipients in article 12 of the Financial Promotion Order (Communications to overseas recipients) (see PERG 8.12.2 G) prevents section 21 from applying to communications which are not directed at persons in the United Kingdom.