Sorry Louise, but there is a lot of noise apparent in the background & the subject is a tad soft too.
When I looked at the EXIF data, I realised why.
The ISO could have been cranked well down, at the expense of a far to high shutter speed. 1/5000, when 1/500 would have sufficed. As it had a good crop also?
All IMHO of course. Perhaps others will say different