"the work needed to put the favicon live was complicated by an old environment (which has since been updated) that caused issues and extended the time taken to

"the work needed to put the favicon live was complicated by an old environment (which has since been updated) that caused issues and extended the time taken to carry out the work." Sounds like their old CMS system made it difficult to actually add a favicon in the template. I very much doubt the quoted price is just for creating the icon.