Trying to help a friend with a sprained neck mount a 14" tv on a bracket in
a 70's flat with internal concrete walls using a standard hammer drill
So, the tv isn't THAT heavy, but the concrete is just not giving! I drilled
a smaller pilot hole (took 5 minutes to go 1" with a 5mm bit) but when it
came to the 8mm bit, really nothing was happening. I gave up after about 15
minutes and 3mm having gone slightly deaf!

Do I: Drive all the way to B&Q and see if there is some super drill bit for
ridiculously tough concrete (is there?) , OR, use a good splurge of "no
nails" to glue a square of wood into the wall, and then drill into that?

Only problem with that would be how she removes said square of wood when
bracket isn't needed or when she moves out and the landlord comes to not
paying the deposit...