It was a blitz tournament, so unless there was some live coverage, which is unlikely, then there wouldn't be many (if any) recorded games in full.
With regards to distance from the rest of the field, which is also relevant to the upcoming tournament, how much 'weaker' does a player become after not playing so much?
Speaking about my personal experience, it doesn't take me much more than a few games to perhaps get to average of my performance, and subsequently after some more games, I get stronger with less rust. I had a good 4NCL season in part due to a steady flow of games like the local league. After a brief hiatus due to exams, this more or less stopped. I had the World Deaf Team Championships in Opatija coming up and I decided to play in the local congress and just without any expectations other than just trying to win one game. Indeed, I overlooked a tactic in the first round and lost, and was a bit more steady after, with 2 wins, and a hard-fought draw. (I had a bye Friday evening)
So, a 2270-odd perf in the 4NCL season, after a little break and subsequent small dip in the local congress I had a 2241 performance in Opatija. Not a huge amount of difference after a few games just to "remember how to play chess again".
Obviously Nunn's hiatus is longer (and at a much higher level) than mine. But I suspect that after one or two reasonably strong tournaments, Nunn won't be that far off his best to challenge for the World Seniors in Greece.