If you were referring to my post Brewsher all I will say is that I am not confusing anything just pointing out the way that Gwent police look at it. Perhaps I should however have said continued good reason rather than "need".
In respect of target shooting they rely upon the following taken from the guidance to police document.
13.53 Target shooters may be expected to use their firearms fairly regularly, say three or more times a year. The police should consider on renewal whether "good reason" continues in respect of all firearms held for this purpose. However, failure to shoot in a year should be regarded as grounds for further enquiries to be made, rather than the automatic partial revocation of the certificate for lack of "good reason". For example, there may be personal circumstances such as illness, working away (where this is not to be repeated regularly), or practice for a particular competition that may preclude the use of all the firearms concerned. In some cases, competitions for unusual or older arms may be few each year. Owners, and especially collectors, may also not want to regularly shoot old, historic, and valuable firearms, thus avoiding excessive wear and tear.
It is my belief that they have adopted a similar stance with regard to continued ownership of firearms purely retained for sporting purposes, that's certainly the impression given by certain firearm enquiry officers.