These might be a bit too local but I'm hoping someone with superior crossword skills might be able to solve them
Across
15. An autumnal Caesar dropped us and joined delta less natives to come here in 1500. 12. ???????N???S
28. A place you don’t want to be unless you’re ill. 1,1,1,1,1. U??H?
(I assumed the answer would be UCHG but thats too few letters)
Down
18. Former priest who could talk for Ireland was a prince they said. 3, 5. ??M/?????