Just received the email. Stay safe, and enjoy :)
Free delivery available for orders placed with most restaurants on the Deliveroo platform from 20/01/21 - 10/02/21. Excludes McDonalds, KFC, Subway, Domino’s, Zambrero, Red Rooster, BP Coochfood and Ben & Jerry’s restaurants. Excludes bottle shops, grocery and restaurants marked ‘delivered by restaurant’ on the platform. Minimum spend of $10 applies (excl. tips) for participating restaurants. In order for the offer to apply, the delivery fee must show up as ‘Free’ in the basket at checkout. Participating restaurants and promotion period subject to change without notice. Not valid with any other offer.
Geographical restrictions apply (see TintyJ’s comment here for locations - thanks).
Mod: Deliveroo sent the email to a number of users who weren't meant to receive it and have now sent an apology email, it may contain a $5 credit. This deal is only for selected areas, as mentioned above, but appeared to have been emailed to many others. See comments.