I have a text file, containing '£' characters, that file -bi reports as text/plain; charset=utf-8
When I try to write a simple pascal program to edit this file using nothing more than copy, insert, and stringreplace, the output file is reported as:
text/html; charset=iso-8859-1
and I get '£' instead of '£'.

Is there a way of forcing the output to be UTF8, so that the pound character appears unchanged?

I'm using fpc ver 3.0.2+dfsg-5ubuntu1 on Ubuntu 17.10, and am not an expert.