Ron I hate to say this, but that is more than what it looks, even now. I can see bubbling right up on the top end of the sill...
Good news is, Bones looked just like that, and when Tom poked there were huge holes - which he fixed in no time at all! He's a top bloke. Let me know when you are coming, and if I am not working, or it falls we can meet up, glad to help with ferrying you - although Tom and his dad are great at that too!