Thank you for your question. My name is ***** ***** I shall do my best to help you.
I am afraid that the Intestacy Rules are strict and do not allow for any other claims.
Unless you were in fact financially reliant on your brother in some way at the time of his death there is simply no claim that you can make at all and all his estate will indeed be shared equally between his parents
I hope that this is of assisatnce