I obviously can't answer for the CAA but, if they apply the same logic where they are allowing EASA licence holders from the rest of Europe to use those licences to fly in the UK, they may recognise your hours. However, at the moment you are still a student, and finishing in the UK would at least be considered as changing your training provider. Unless the CAA agree to recognise a recommendation as ready for test from Malta. If they do not, you would need to be assessed by your chosen UK provider. That provider would need to examine your log book and a copy of your student training record from Malta (which you would have to formally request they send). Depending on how long ago the training was, they may decide refresher training and/or a mock test be flown before recommending you for the LST here. In any case, you would need some dual flying to become familiar with how different things are in the UK skies, in order to fly safely and confidently.