Mortgages for Flats above Shops

Just looking for thoughts - am starting to house hunt for my first home and living in London, many of the properties available are above shops and commercial units. Have read various thoughts on whether these are a good investment or not but my main concern is how easy are they to get a mortgage on. I appreciate they have downsides but I also love the larger spaces they often offer.

Some of the flats I've seen advertised are really nice but I don't want to waste my time (or the owners!)if they are hard to get a mortgage on.

Are there particular lenders who are more open to these kind of properties?

Thanks
Fi