It’s interesting that pubs have been drawn into the conversation. The pub trade generally most certainly is in crisis. In 2017 they were closing at the rate of about eighteen a week:
https://www.morningadvertiser.co.uk/Article/2018/03/19/How-many-pubs-closed-in-2017
The main reason cited is the tax burden placed on them compared to supermarkets. (I happen to believe there are other reasons at play, but that’s beside the point here). However, as has been pointed out, that does not apply to the entire sector. The investments being made by the Pubcos are concentrated on their establishments in larger towns and cities. Pubs in those locations have been somewhat insulated from the problems faced by pubs in less busy areas because the owners enjoy decent custom for about fifteen hours each and every day. Pubs in quieter locations are lucky to have customers in any number for about five hours. Ironically most of the pubs in towns and cities gain a lot of their custom from High Street footfall. It may not be long, however, before some of them feel the pinch from people deserting the High Street. As a taster, Wetherspoon’s, whose business model relies mainly on such footfall, sold 23 pubs in the last financial year.
Kavlidir has enumerated very well the financial burdens of running a small shop. For many it is simply unsustainable. Apart from business rates, many high street properties are owned and rented by the local council. Unlike commercial landlords who have to adopt a pragmatic approach to their business, local authority landlords don’t particularly care whether their properties are empty or not. They have a “set rent” which must be paid regardless whereas a commercial landlord would do a deal with his tenant to help keep him in business, preferring instead to have a proportion of the rent rather than no rent at all.