Here is a PDF with hotlinks to the local hotels http://bsp.uk.net/wp-content/uploads/2018/01/BSP-2018-Aberystwyth-Accommodation.pdf

Delegates who have booked university accommodation (rooms at Pentre J Morgan) should pick up their room keys from the Porter's Lodge, Aberystwyth University Penglais campus main entrance. The Porter's Lodge is open 24 hours a day.
On Sunday coaches will be available to shuttle delegates from Aberystwyth Railway Station and Old College to the Porter's lodge.