My father, an ex-serviceman, transferred the licence and weapon in my name before his death. There are no markings on the barrel or the butt, and just below the bolt it says "CAL 30" and the registration number of the rifle.
The licence also says ".30 bore rifle" with the registration number. These are photos of the rifle, can anyone identify it??
Sorry for the poor quality photos, but is it a .303? It's been with my family for more than 40 years, unfortunately my father suffered from bouts of dementia and could not tell me about the rifle or the licence before his death, and that licence (transferred in my name) has since expired

I already hold a valid .22 rifle licence, do I submit the .30 bore to the nearest police station, and then re-apply for the licence. Or if it is a prohibited .303 then what should I do?