You are talking about tariff income which is £1.00 pw for every £250 bundle or part bundle over £6k for claimants under pension credit age or £1.00 for every £500 bundle or part bundle. If you have over £16k then you are not entitled to any mean tested benefit.
£1.00 per week equates to £4.33 per month per bundle or part bundle.
Gary
Nothing on this board constitutes legal advice - always consult a professional about specific problems