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Thanks both.

With regard to the possibility of T.furcatus which I couldn't rule out, Ian Andrews on iNaturalist said :

"Yes, that looks to fit to me...the prealar bristle is definitely shorter than the posterior notopleural, which points to rostratus (at least from UK species). furcatus apparently has only 3 post-sutural DCs acc. Gregor et al. 2002 "