Might be worth keeping an eye to the sea! The albatross sp. seen 20nm west of Guernsey on 15th May turned up again 20nm northwest of Alderney on 17th June (around an angling boat), where photos taken confirm an immature Black-browed, see http://marinelife-charm3.blogspot.co.uk/. Unfortunately this is still a good way off any Devon headland (35+nm), but you never know!
Edit: ....and again 20nm NW of Alderney on 22nd June