Badge Identifications

Can anyone make out anything from the badges on this chaps arm?
He was in Sicily and Italy, was in the PO valley battle.
I'm trying to work out what regiment he was in, I'm not sure if you can tell this by the badges on his arm?

 

Sergeant in the Royal Artillery.
He has a cannon above his stripes.

Other Ranks rank badges - The Royal Artillery 1939-45

Another example here.
Original 1941 Dated Royal Artillery Sergeants 1940 Pattern Greatcoat

Not sure of the formation patch at the top of his arm.

 

Badge at top of his arm looks like this.


badge, unit, 1st Infantry Division Royal Artillery. Image: IWM (INS 5344) IWM Non Commercial License

Red & blue other way around on this one.

1st Division Royal Artillery Formation Badge

 

I agree with Owen it is the 1st Division badge, worn on both sleeves red to the front. He is a substansive Sgt, Lance Sgts did not wear the gun. !st Div had the same RA units for most of the war so he would have been in one of the following:
2 Field Rgt RA
19 Field Rgt RA
67 Field Rgt RA
81 Anti-Tank Rgt RA
90 Light Anti-Aircraft Rgt RA
Unfortunately none of these units had their own distinctive badges so I can't even eliminate any of them.

 

Thanks guys I really appreciate the help.