Yes, looks good, altho probably this one here? - the sloping-strip of ceiling (and presumably, the whole ceiling) appears to be a continuous mortar/plaster-type substance, definitely not plasterboard, and about 12mm- 15mm thick, with hollowness behind, ie, needs an expander-bolt type of mechanism:
Screw-set Insulation Fixings for wood fibre insulation boards (ecomerchant.co.uk)
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