Loads of planes not showing up in Birmingham UK area.

Hello!

I have noticed recently that a lot of planes in the sky coming to land at Birmingham International Airport (EGBB/BHX) haven't been showing up on FR24.

Is there a problem with the coverage in this area?

I have been watching planes coming in to land, since I'm pretty close to the airport and have noticed they're nowhere to be seen on the radar.

Any info on this?

Thanks.