The vacuum cleaner idea is good however again the 2.5m drop kills it as the hose isn't long enough.
Mrs Hondo and I have decided the only way is to remove the panel that covers the gap at the front but it's a 10cm x 2.5m length of chip board basically and is both glued and screwed in as I found out tonight and so will very likely snap if I pull it too hard. I'd have to very carefully remove it and then put it back.
Mice won't be able to get to it is some consolation.
I bought another packet of Sultana Bran tonight in the meantime ....

