Share ISA and year to year dividend taxation

Scenario: Tax Year 1. Someone invests in a share ISA to maximum allowance of £20K PA. Dividends from that investment are understood to be tax free. Tax Year 2. That person invests a further £20K shares into ISA Question: From the perspective of Year 2 and subsequent years, are dividends from all previous share ISA investments (e.g. Year1) tax free, or just the current year?

Hi,
We cannot comment on scenarios or examples, we can only provide general information / guidance in this forum.  
For an answer to a detailed question of this nature, you would need to seek professional advice.
Thank you.

Thanks for the reply, but I am disappointed as none of the information in my query identifies a person nor the detail of the investments - merely values invested against tax years within the personal allowance. Is there a FAQ page within HMRC you can direct me to instead perhaps? If that isn't available it begs the question as to why there isn't greater clarity for people wishing to use fairly standard options for annual ISA allowance, and people should not need to purchase third party advice, which can be quite costly.

Hi,
This forum is for general queries only and is intended to help you self-serve. We are unable to provide specific advice tailored to individual circumstances. 
Thank you.