Codicil wording regarding redistribution of estate

[auntyjane]

Very simple will with only money in bank accounts involved,around £80,000.

At present the will states this is shared equally between the 4 children of the benefactor,however she wishes that if 1 or more should pass away before her then the estate be split equally between her remaining children and that the deceased beneficiary 25% not be passed down to their children but to her surviving children.

How would one word this in a codicil please? It is in England if that makes any difference..

Thank you

[auntyjane]

would this suffice?

section 33 wills act 1837 shall not apply to my will and descendants of my beneficiaries shall only take a parents share where my will specifically provides they should.