As B*Cat alludes to, it all depends on the installation you have at present, as to how the FTTC transpires ??
Whatever state your installation is at present, you will be left with a new NTE5 back-plate, a VDSL intermediate plate, and a NTE5 frontplate, all of which form one chunky looking Master Socket.
As engineers, our brief is to install the white modem (Huawei or ECI, dependant on the vendor in your area), against a wall by fitting 2 plug and screws. This may mean a minimum of drilling. If you (or your landlord) are insistent no holes are to be drilled, then I personally would inform you of how they need a good airflow around them, and mention this in the note to cover myself should the modem overheat.
All-in-all, if you have just one telephone socket in the premises, and you wish the new VDSL modem and Hub to be sited next to it, then the actual 'installation' shouldn't take much more than an hour. That's the Cab work, and testing and demo'ing all in, as well as the socket change.
Two things you will need for the engineer though are 1) An extra 240v power outlet for the additional modem. 2) A kettle, some coffee and a tray of biscuits.
The actual VDSL speed you will receive, is dependant on the outcome of 2).