Cumnor

Hi, just wondering is it possible to find out whether there might be filming for the new series going on in Oxford or thereabouts around the 21st - 24th of May? I will be visiting Oxford with my wife then (she used to live there for a few years in the 90s), and we would love to try to stumble open a bit of shooting (pun intended). I had read somewhere that filming would start in May. Thanks in advance if anyone has any information or suggestions.