All perfectly verifiable by checking the Research Paper to the Referendum Bill. The relevant section 4.1 states:-

"4.1 Types of referendum
This Private Member’s Bill requires a referendum to be held on the question of the UK’s continued membership of the European Union (EU) before the end of 2017. It does not contain any requirement on the UK Government to implement the results of the referendum, nor set a time limit by which a vote to leave the EU should be implemented. Instead, this is a type of referendum known as pre-legislative or consultative, which enables the electorate to voice an opinion which then influences the Government in its policy decisions. The referendums held in Scotland, Wales and Northern Ireland in 1997 and 1998 are examples of this type, where opinion was tested before legislation is introduced. The UK does not have a written codified constitution which would require the results of a referendum to be implemented, unlike for example the Republic of Ireland, where the circumstances in which a binding referendum are held is set out in its constitution."

I've emboldened the appropriate sentences.

The whole Research Paper to the Bill can be found here