Not going on the defensive here but some balance is needed to this discussion - Another minor point that is always overlooked on forums and FB groups (How I despair at the FB groups some days) is that we are legitimate trading business rather than DIYer's taking cash jobs in the evenings - A "Business" by definition has to make a profit by "trading" (aka providing a service or services) to pay it's over heads as well as pay us something at the end of the month.
We do the 172/182 AC vehicles with dephaser currently for £590 including VAT at the current rate of 20% (That price is coming down in April as we've just had our prices restructured by Renault UK yesterday). From that price though the business actually makes £151 and some pocket change on that job as our "fee" (which is not to be confused with what I actually take home in my pocket not to mention HMRC's percentage). I wish I could do this job for nothing i honestly do but I have food to put on my table, a car on my driveway which I like to enjoy on track days, a mortgage to pay each month so I have somewhere to put my table and sit my family around to eat food, etc... If you want a £278 belt change buy the parts yourself from Adam and do the job yourself.
Mick