Uber Boats offering a Gravesend/Tilbury to London service this half-term

For a couple of days later this month, Thames Clipper will be offering a service from Tilbury and Gravesend to London, and back again.
From Gravesend, the boat will take 40 minutes to reach Greenwich Peninsula (North Greenwich Pier), or 60 minutes to London Bridge (London Bridge City Pier). The service leaves Gravesend and Tilbury at 9:45am/10am, and returns from London Bridge at 4pm. Tickets need to be booked in advance from here.
Sadly, there’s not an option for a day-trip to Gravesend f