I guess she will have to look into the problem first, then make suggestions. However I do fear there is little she can suggest to halt the decline.
I live on the edge of Birmingham, and when we moved here 20 years ago we had a thriving high st with woolworths, halfords, dixons, a record shop, 3 newsagents, and loads of other assorted independent shops.
Then a large Tesco was built nearby, then a large Sainsburys, then a few medium sized supermarkets were built in the area, then a large retail park with huge shops like Toys R Us, B&Q, Comet, Currys, Homebase, Habitat, Boots, etc etc etc.
Gradually one by one the shops closed in the high st - Dixons and Halfords soon went, then other shops, then Woolworths went, then Adams, and so on.
The high st is now made up of quite a few banks, loads of take aways like fish and chips, pizzas and chineese, loads of charity shops, and quite a few empty shops.
Of course we have online shopping now as well (All the CDs and DVDs I have bought in the last 5 years have all come from Amazon as well as much of my Christmas shopping).
I cant see any way of saving the High St when there are so many other places to shop, particulalry as supermarkets offer a "one shop" experience, with free easy parking.
I will be interested to see her suggestions.