<span dir="auto" style="vertical-align: inherit;">I'm looking to get my boiler serviced and need any recommendations for the Bristol area. I came across this company Willow & Matthews Plumbing & Heating Ltd and on their website the description lists that they offer: </span><span dir="auto" style="vertical-align: inherit;">boiler service bristol</span><span dir="auto" style="vertical-align: inherit;"> , repair, replacement and installation, I'm looking for a competent engineer whom I can trust not to overlook anything when examining the boiler to ensure that I keep it ticking over. What should I look for when choosing the heating company</span>