Ferry company DFDS is offering low-season discounts on its Newhaven-Dieppe route across the Channel.

The offer is £49/€59 one way for a car and caravan (8m maximum length, the caravan goes free) plus two people travelling between 6 January 2021 and 30 April 2021, and 1 October 2021 and 15 December 2021.

The ferry sailing times are Newhaven to Dieppe, Sunday night 11pm, and Dieppe to Newhaven, Saturday at 6pm. An extra adult in the vehicle is £7.50/€10 one way; for a child (aged 4-11) it is £3.75/€5. The Newhaven-Dieppe crossing takes four hours.
https://www.dfds.com/