It took place in St John’s Square and coincided with similar ceremonies in towns and cities across the country following on from the national proclamation event, taking place at St James's Palace, London, on Saturday.
Here’s the best of our pictures from photographer Iain Lynn.
7. Royal proclamation in St John's Square
Tributes and messages of condolence Photo: Iain Lynn
8. Royal proclamation in St John's Square
Crowds in Blackpool watch the Mayor of Blackpool read the royal proclamation in St John's Square Photo: Iain Lynn
9. Royal proclamation in St John's Square
The Queen's favourite Paddington Bear Photo: Iain Lynn
10. Royal proclamation in St John's Square
Tributes and messages of condolence Photo: Iain Lynn
11. Royal proclamation in St John's Square
Flowers were the order of the day. Photo: Iain Lynn
12. Royal proclamation in St John's Square
It wasn't just humans taking in a bit of history. Photo: Iain Lynn