Sink and kitchen taps both run hot, and the shower, so its not a problem with the boiler/hot water.
Bath tap is a mixer tap, but even if you don’t turn the cold water on then the hot still doesn’t get very hot. Happy to have a new one fitted if that will fix the problem, don’t like the current tap anyway!
Great service from Gem Solutions. Quick response on emails, and the engineer who carried out the work was friendly and professional and had it sorted it no time at all. Would recommend and would use again.