No. The latest you can buy a policy from us is at 11pm, the day before you'd like it to start.
If you need a single day of cover to tide you over, there are many providers of temporary insurance that you could use.
We can't make any recommendations, and you should do your own research to find the best policy. To help you on your way, you could look at Cuvva (mobile app based) or Sky Insurance (web based). If you have an iPhone, we've also negotiated a 10% discount on temporary insurance from our friends at Lenny - use code BYMILES10.
If you are buying a new car, most car dealers will also be able to provide you with some free 'drive away' insurance.