Enter UK without brp

[Ilijamiljkovac]

I am 16 years old student of Ackworth school(Pontefract). I am from Montenegro and I lost(stolen) my BRP in November this year in Birmingham. I reported to the police and than with help of my school stuff I applied for new BRP. I enrolled biometrics in November 30th this year and I have been told that it will take 4 to 8 weeks for new brp to come. Since half term ended in December the 8th and school closed I got back home Montenegro). Now I need to get back to school at January 8th 2018 and I am afraid that new BRP can be late up to the end of January. What to do? Can I travel to UK without my BRP? I have document from Home Office like proof that I applied for BRP replacement

[Casa]

The airline is unlikely to allow you to travel without a valid entry document.