Spanish here, applied for PR before the referendum and got it the day after the referendum. Went for citizenship last year as I don't trust them, any of them (them = current / future government).
I thought Remain would win (any other 'movement' not being very smart) but had a feeling it would go wrong, although at the time I thought wrong meant very small win so Leavers would want a 2nd, 3rd referendum and would make everything difficult and nasty.
Wasn't too sold on citizenship as Spanish Law is more or less clear (re Civil code, however in a strangely worded article) but at the same time ambiguous (plenty of interpretations on the Internet, mostly posters saying it was impossible to get a second citizenship without renouncing the Spanish one); lot of research, info from the Consulate in London (took months because they never answer calls and rarely reply to emails) and confirmation from a diplomat in my mother's side of the family that it could be done if within 2 years from acquiring British citizenship I formally declared in front of the Consul that I wanted to retain Spanish and this 'deed' was registered in Spain (birth certificate in both national and local registries). I got confirmation of this last step only last month, mission accomplished within timeframe!
MIL is Italian and she says there is no way she is going to apply for PR or citizenship. She's been here since was sent to boarding school in the early 60s, married a Brit/US citizen in 1969... She says she is not going to document her life for the Home Office when they know perfectly well where she's been all these years...
I have a German friend who left last year (her company is moving HQs to Germany because of Brexit and she volunteered to go first as she says she has seen a face of this country she had never realised existed at all) and another German friend says, like MIL, she is not going to apply for any documents. She will leave if she is made to document her life for the past 15 years or even the 5 needed for PR. Her boss is mad at it, doesn't want her to leave (qualified professional in niche field).
forevernotyoung
I think you can apply inmmediately for citizenship if the more than 1 year has passed since the date you acquired PR (different to the day the PR document is issued). This is for applicants who are not married to British citizens so even in this more restrictive case you can apply immediately if your PR was acquired, for example, in Feb16, even if you only applied for PR in Jun18 and the PR card is dated Sep18. I think they are now sending PR documents with a letter showing acquired date as there were a lot of enquirers about the two dates.