The pedestrians were seriously injured when they were hit by a black Suzuki Swift on Saturday night.
The UK government announces further air defence systems will be sent to countries in the region along with troops to operate them.
The case was dropped in 2019 after the CPS deemed there was insufficient evidence to bring charges, police say.
A three-year deal to pay for more French patrols to intercept smuggling gangs was due to expire at midnight.
Hedge fund founder Chris Rokos said he wanted to "give something back" to the UK with the donation.