This one is quite speculative, but I think it may be an early example of Julio Bosch. This artist did a lot of work for Fleetway and DC Thomson girls’ titles from the 1960s to the end of the 1990s, and his style during that time was notably different and more individual than this – more spontaneous and much less heavily inked. However, I’ve seen other cases of Fleetway artists whose style became freer and more characterful after they had escaped what seem to have been house style restrictions in the 1950s comics, and there are some distinctive details here in the way faces and figures are drawn which look characteristic of his later style.
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Schoolgirls' Picture Library 64 - Jenny - Girl Reporter