Re: pseudonyms
I think as long as your pseudonym reads like a real name, you're unlikely to have problems. So 'Angry Woman' is suspect in a way "Janet Gordon" might not be. The one in the link upthread came suspect because they said it was a reversal of a likelier name and seemed questionable by that.
The resulting problem is that you can't complain to the Information Commissioner (or however exactly the next port of call is) if public authority's response is wildly inadequate. But I think this is sacrificable.
If you have a common enough surname, FOI's own information allows you to put in an initial instead of your name. But the thing broadly is searchable by search engine. The problem then comes if you have a very rare (or even individual) surname. Then there is no escape by their rules and under the latter circumstance, I am not going to submit my name to that.
I've put in an FOI under a pseudonym. We shall see. It's a real surname, even with some broader connection to me, it's just not mine.