Reason?

IMO not political voting. Not anti UK feeling due to Brexit either.

Each country gets to vote for their top 10 of the 25 other songs. These days the song is only part of what they judge acts on. Equally, and maybe more, important are the production, the effects, the choreography etc.

The UK entry was a poor song. The presentation was pretty static with nothing like the special effects etc of many of the other acts. Poor production.

Simply not good enough to make the top 10 based on the criteria folk use these days. It was definitely in my bottom 5.