Black Nike running tights with neon trim

I lost my black Nike running tights yesterday around 3pm near the Tate Modern on Bankside in London. They're size M and in good condition aside from a tiny snag on the right knee and a faint crease from being crushed in my gym bag. The side seams have a neon lime stripe, and there's a small pink heart stitched inside the waistband—one of a kind feature I remember well. They hold sentimental value for me because they were a gift from my sister, and I really need them back. If you found them, please drop them off at the Tate Modern reception or email me at [email protected] so we can sort out a pickup.