The note was left just after 7pm on 8 January at an address in Aberystwyth.

"Iorwerth Ave. was once a quiet, pleasant residential area until a load of s*** from the Midlands hit it," the hand-written note read.

"Low-life like you should be forced to live in fenced in tinker sites preferably back where you come from."

The word "tinker" could be considered offensive as it has been used as a derogatory term for the Traveller community.

"Why don't you take your clapped out, crappy boats, Jeeps, cars and your hideous, vomit-inducing accents back to Brummyland and please take a few thousand other yaw yaws with you," the note added.

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A spokesperson for Dyfed-Powys Police said it was "investigating a hate incident in Iorwerth Avenue".

"An offensive note was left outside a property that has caused distress to the occupants," the spokesperson added.

"Officers would like to speak with the individual who left the note."

The force has asked anyone with information, CCTV or camera footage from doorbells that could help its investigation to get in touch.