> I thought this was because Britain didn't have a constitution as such so the don't have actual referendums?
The UK does have a constitution, it's simply not codified into a single document. Parliamentary sovereignty means that Acts of Parliament are part of the constitution, and so any referendum's result cannot be binding, which may partly explain why they weren't seen as part of UK politics up until recently - there have only ever been three national referendums, one on EC membership in 1975, on changing the voting system in 2011, and leaving the EU in 2016.
The UK does have a constitution, it's simply not codified into a single document. Parliamentary sovereignty means that Acts of Parliament are part of the constitution, and so any referendum's result cannot be binding, which may partly explain why they weren't seen as part of UK politics up until recently - there have only ever been three national referendums, one on EC membership in 1975, on changing the voting system in 2011, and leaving the EU in 2016.
https://en.wikipedia.org/wiki/Referendums_in_the_United_King...