People have been lobbying on this topic mate. I don’t follow the politics closely , but it is highly likely that there will be a ban on this type of sponsorship on sports merchandise in the next few years.…if people feel strongly about this then they should surely lobby their MPs to pass law to ban betting sponsorship on all sporting merchandise in the U.K. in the same way it has for smoking products.
The club is acting within the guidance of the existing law, they are exploiting this to gain the most favourable investment. If folk want change, then look to change the law.