Why can't i sign players from England trail squad?

Just started a new save with Chichester City United (my local team) using superblades English tier download. And i was invited to the England trail day. I thought great!, i'll be able to sign some players for free. So i watched the game... saw 3 players that i wanted, after the game i go to the players i want to sign and i cant offer them contracts, not any of them.

Does anyone know why this is? Is it because i am playing with a team that is only playable through a download?

Thanks,

Matt.

I think you have to scout them before you can sign them, which is a really odd thing. I personally would prefer the game to treat it as if it were a normal friendly and we can scout and sign those players as normal.

You'll have to wait until the day after the trial day to sign them - this is to stop managers signing the players who are due to play in the trial day before the trial day actually takes place.