Lost and Found BRP

[khalife23]

Hello,

I did a silly thing. I thought I'd definitely lost my BRP and reported it as lost/stolen which cancels it immediately, only to realise that I left it in the UK instead.

So now I'm debating whether I should have someone send it through DHL Express to me so I can try and pass through UK's border control and explain my situation, or I should apply for the replacement BRP which would delay my flight back for 3 weeks or so.

Important to note I have a Lebanese passport, and it's also a new one that I just got today rather than the old that I used to get my Visa. Not sure if that's relevant.

What is the likelihood that I will be let in do you think? And what is the worse thing that could happen if I attempt to do it and fail?

Thanks.