How Much to fit Glow worm electrode

[luckyvee]

My local gas engineer replace the PCB on a Glow worm ultimate for £400.00 which i think was fair so i have paid
The engineer then told me it needed a new white electrode which his words cost about £20.00
He fitted the new electrode this afternoon , I was out working he called me to say boiler working all ok now
Then he said to fit the new electrode would be £180.00 which seems very high he was only there for 30 minutes max
What do you think i have not paid yet and he is already texting me for the £180.00

 

[Wayners]

I'd ask about bill. See what they say.
It's a tuff one tbh.
Quality of work and service. Stand by work and come back if there is a problem.
Probably half day wage plus parts so £125 plus parts plus vat approx.
Wasn't 30 mins. Travel. Pick up parts ect was 2 hours. Guy needs to charge half day as not much chance to find another small job to make up half day.
Consider training and knowledge as well.