Lost two Coldplay concert tickets dropped near Nottingham city center.

I lost two tickets to the Coldplay concert while walking near Nottingham city center on October 15th. I had them in an envelope and must have dropped them while checking my phone. The tickets are for the show on October 20th and are quite important to me, as I’ve been looking forward to it for months! Please let me know if you have seen them or found anything that fits the description.