There are controls every 100k you should fine without a bivvy, I have an emergency one I sometimes carry in case something goes wrong, I've never used it so can't comment on how suitable it is.
https://rockrun.com/products/sol-emergency-bivvy?utm_source=Click&utm_medium=Channel&utm_campaign=Google_GB&ref=SFDR_55911844&variant=31456470728&gclid=Cj0KEQjwnazLBRDxrdGMx-Km4oQBEiQAQJ1q66AH_SDOstCh05Vnrh9Bk7RZDgV2pYMMIZL_Z3yD0W8aAhgo8P8HAQ
Don't think I'll take a bivvy either. more room for pasties
@Thrasher started
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There are controls every 100k you should fine without a bivvy, I have an emergency one I sometimes carry in case something goes wrong, I've never used it so can't comment on how suitable it is.
https://rockrun.com/products/sol-emergency-bivvy?utm_source=Click&utm_medium=Channel&utm_campaign=Google_GB&ref=SFDR_55911844&variant=31456470728&gclid=Cj0KEQjwnazLBRDxrdGMx-Km4oQBEiQAQJ1q66AH_SDOstCh05Vnrh9Bk7RZDgV2pYMMIZL_Z3yD0W8aAhgo8P8HAQ