The warbler was observed over three days in the sparse garden of the Sumburgh Hotel, Sumburgh, Shetland.
No interactions present.
To be honest Christine, it could be a Chiffchaff also. I'm pretty sure it's not an Icterine which I think is the conclusion you yourself came to.
Lat/Lng: 59.863, -1.28
OS grid ref: HU404088
Garden of Sumburgh Hotel, Shetland