George Sampson Britain's got talent?

Can anyone help ive heard George has hurt his back and wont be performing at the varity show. Is this true cant find much about it on the net, and have'nt heard on the news or anything. My son told me, one of his friends told him at school, if you look on the offical web site for George it does mention it but the person who wrote it is not shaw. Wot a shame if this is true such a wicked dancer maybe signiture will do the show instead now if this is true