Found in the day time on a bright sunny day.
No interactions present.
The species Pyrausta ostrinalis is very similar to P purpuralis and to be certain of the id it would be necessary to inspect the underside of the forewing (ostrinalis has a sub-terminal line that reaches the costa, whereas on purpuralis it peters out before it reaches the costa).
P ostrinalis is the rarer of the two species and - according to the National Biodiversity Network Gateway maps (see UK Moths web-site) - appears not have been recorded in Warwickshire whereas purpuralis is much more widespread. However, due to the similarity of the two species it is possible that P ostrinalis could be more widespread than the records suggest.
I have only found this moth a couple of times as I am relatively new to moth identification.
Once was in Warwickshire and once at Aston Rowant in Oxfordshire. Your comment raises interesting possibilities.
Lat/Lng: 52.2517, -1.4454
OS grid ref: SP379616
Grassland and woodland on area previously used for limestone quarrying