Professor Elliott said the blooms of algae can release toxins and can be identified as a "messy green colour" in the water.Northern Ireland Environment Agency said there was no visual algae bloom in the water (Image: Getty).

A BBC and Ulster Society for the Prevention of Cruelty to Animals investigation found puppies were being bred in the Republic of Ireland and Northern Ireland and illegally moved across to Great Britain through Belfast port to cater for the rocketing demand for pets during the Covid lockdown.

They will need a new AHC for each trip to the EU or Northern Ireland.

From 1 January, people travelling from Britain with pets and assistance dogs will need to ensure they have an animal health certificate (AHC) instead of a pet passport no earlier than 10 days before travel, the UK government said on its website.

Ashleigh and Marley on the walk (Picture: Ashleigh Murray)But the big event she wanted was a huge walk, inviting dog owners and their pups from across Northern Ireland to join them, making one of his final walkies one to remember.