Hi Phil
When you look at the medal roll pages and not the Medal index card (MIC) the 1915 star says he was with the 23rd Bn Manchester Regt, the British War Medal & Victory Medal (BWM&VM) roll page says he was with the 13th Bn Manchester Regt, he moved across to France 7th Oct 1915. There is an Edward Hagan who was in the Lancashire Fusiliers, this was another Regiment that was base around Salford & Manchester (Greater Manchester with its HQ in Bury)
Here are the other Edward Hagan's with MIC, you should also have a look at the E.Hagan see attach
This is from the 1911 census:
Name: Edward Hagan
Age in 1911:21
Estimated Birth Year: abt 1890
Relation to Head: Lodger
Gender: Male
Birth Place: Manchester, Lancashire, England
Civil Parish: North Manchester
County/Island: Lancashire
Country: England
Street address: 45 Albion Terrace Miles Platting M/c
Marital Status: Single
Occupation: Fruit Salesman
Registration district: Prestwich
Registration District Number: 467
Sub-registration district: Newton Heath