My Great Uncle E C Groves(link), one of the three Groves brothers, had his will changed (because his army number had been changed), on 28/8/1917 when he was at Floriana Military Hospital in Malta. These were formerly the Floriana (Lintorn) Barracks.
Photos of one of the 3 barrack buildings which were the Floriana Military Hospital during WW1. These are now Government buildings so access is limited. The top parts of these were visible from our Hotel balcony.