Recent locations influence Google Search Results
Earlier this evening I decided it was high time I got another eye test, so I searched for “Specsavers” in Google.co.uk:

Anything out of the ordinary here? For me, yes! I was in Croydon this weekend and prior to leaving the house I carried out a few searches for the location of the party we went to and the hotel we were staying in later on. While searching, I added one of those locations to “my locations” in Google Maps.
It seems this now means that for a few brand searches, my most relevant results are based in sunny Croydon:

