Michelin Sport Cup wear - advice

[Marchino]

Hi there
as new to the CSL world and to the Cup tyres, I need some advice on the wear on these tyres.
Next week I am booked for the track day at Silverstone (Easter monday) with some of you guys and I am not sure what to do with my tyres.

Last saturday i did half day track at Bedford and the tyres now look with very tired.... when I bought the car in Feb they look almost new (I think I have done less than 1000 miles and 1 half day track day).
I found it difficult to judge the amount of thread left but they don't look in good state
do you think it would be dangerous using the same set in Silverstone next monday? what about if it rains?

I will try to take a picture of the tyres so you can better assess their condition

cheers