Key set on red carabiner with lighthouse charm

I lost my key set yesterday around 3pm outside Exeter Central Station, near the taxi rank on Queen Street in Devon. They’re on a bright red carabiner with a small brass lighthouse charm and a blue USB key tucked in between. There are two house keys (one old brass, one modern satin silver) and a black Toyota fob. One of the keys has a noticeable dent near the head and a tiny white paint chip on the lighthouse charm makes it easy to spot. The set has sentimental value—one key opens my late grandmother's house—and I really need them back.