[#1973] Minor improvements to OSA content

[mdeuk]

Relevant issue(s)

#1973

What does this do?

This corrects a typo (CESA should be CSEA), and makes some slight changes to the copy, so that it flows a bit better. It also spells out CSEA, and references Ofcom with their common name.

Why was this needed?

The copy was good, but it did not flow very well on user's screens, so it looked a bit like a wall of text (within one!), and there were a couple of typos (ref #1973 (review)).

Additionally, we referred to Ofcom as "Office of Communications" - we should try and avoid govspeak here, and use the more common name.

Implementation notes

Nothing to note.

Screenshots

From	To

Notes to reviewer

The HTML on removing_information.html.erb is not consistently formatted. I've reformatted the bits in play here, but you might want to look at it more generally.

[garethrees]

Nice thanks!