Undoubtedly a few swallows of all three species, but mostly house-Martins, do "lie up" in England every winter, but probably very few survive to the following spring.
"Afoot in England"
W.H. Hudson
I have had, however, in my practice two free-Martins that have bred.
"Cattle and Cattle-breeders"
William M'Combie
A word here as to free-Martins.
"Cattle and Cattle-breeders"
William M'Combie