An excellent Trifid Paul, all the main elements are well executed, it looks believable and natural, in fact my first impressions were of Marcus Davies
award wining version 
My bits of feedback would be that it looks like it could do with some more selective sharpening, the jet is well revealed, in fact it is two jets, the long one angles back into the field while the smaller one angles out of the field and you can see this effect in your image nicely
Mike