Thanks for the suggestion Doug. There are a few reasons I thought it might not be maculata (although it may well be).
The light cap colour and lack of fibrous white scales at the centre
No reddening on the stem nor white wooly stem apex
GEC are not club-shaped but cylindrical to flask-shaped
It keyed out in my very old key to I.fastigiata (and Dominique suggested I. rimosa which is the modern name). However it doesn’t really fit with rimosa either as
It has a slight bulb on some specimens
the cap is not as strongly radially fibrillose as expected
it is more a more golden yellow than reported
There is a suggestion that rimosa is a variable group, but then maybe maculata is too…?