The Aberystwyth depot for Arriva Buses Wales will close today, alongside those in New Quay, Lampeter and Dolgellau.
The company says the period of instability regarding public transport funding - together with spiralling fuel costs, has put unsustainable financial pressure on their Aberystwyth operations.
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Evening sunshine will give way to a dry and clear night with light winds.
A survey found the posts included comments about the teachers competence, and appearance.
Temperatures will rise steadily in the strong June sunshine.