Residential to commercial

Hi All
I live in england and have a problem you guys may be able to give advice on.
My next door neighbour has submitted a plan to convert her residential house to commercial shop premises.
It is a residential area but we have purpose built shops 500 yards down the street, some which remain empty.
My house joins as in semi detached. The first i new about it was the notice on the lamp post outside the house.
Iam going to put an objection in but not sure what relevant things i need to include in my letter.
Such as devaluation of my property, would that be a valied point of argument?
My worry is that if she sell her property i could end up with maybe a takeaway next door!
Thanks in advance
Butty

Hi Butty, this is an Irish based site, so may not be the best place to answer your query, your local authority should be able to provide some information. These previous threads here may offer some advice that is applicable to you, but there may be differences in the English planning process.
Leo