Ultrasound for gender reveal??

Rif • Trying for baby #2 :D xo
Anybody on here in the uk on nhs? I'm wondering if at my 12 weeks scan tomorrow I can ask if they can tell the gender? Did any of you get told before your 20 weeks scan because I only get two scans a 12 week and a 20 week and don't have money to do a 3D or extra one outside of hospital. Xx