Hello My name is Ian ~ I am not on the site constantly so please be patient whilst waiting for responses to you queries
Just refresh me with the model number will you its been a hard week ~ Ian
OK found you, Fagor induction hob, right power off first and then you will need to get under the hob release the retaining brackets and gently push it through the worktop ~ ping me when you have got it out ~ Ian
You should have clips that lock the hob unit to the worktop, there are usually two at the front and two at the back, alternatively sometimes two on left hand side two on right. When you have them undone carefully push the hob thro the hole, this is the dangerous bit as if the kitchen fitter has siliconed it in you can damage the worksurface, slow but sure at this point.
OK no worries, I am away over the weekend but I will take my laptop and log on here from time to time to see if you further help