Sony is rolling out the May 2020 Android security patches for its recent flagship devices. The Xperia 1 and Xperia 5 sees new firmware build 55.1.A.8.1, while the Xperia XZ2 and XZ3 family sees firmware build 52.1.A.2.1. There does not seem to be any other changes, and as usual Sony hasn’t provided any changelog.
Just checked and the update for Three Ireland is available since yesterday
Recent Sony Xperia firmware updates
Xperia 1 / Xperia 5
New update: 55.1.A.8.1 (Security patch: 1 May 2020)
Old update: 55.1.A.3.149 (Security patch: 1 April 2020)
Xperia XZ2 / XZ2 Compact / XZ2 Premium / XZ3
New update: 52.1.A.2.1 (Security patch: 1 May 2020)
Old update: 52.1.A.0.672 (Security patch: 1 April 2020)

