Running Ethernet Through a Ceiling

Wait until after the new year to drill any holes.
The call out charge from the plumber will be cheaper than during the holiday period.
And the ambulances/nurses situation should have eased by then, should you electrocute yourself.

Only if you hit something, heating pipes, electric cables, body previous owner hid under floorboards etc.

I remember hubby once drilling a small hole to lift a floor board so that he could see where the pipes and wires were when he started fitting the central heating system. The first hole went straight through a black plastic water pipe (old house).
I was away, but having turned off the water and got quite a lot up with a dustpan and buckets he did a reasonable job with 4 hired dehumidifiers before I got back.

PS. know where the water stopcock is before you start.

At 65mbps you'll be good with powerline or WiFi discs. Unless you need cross device bandwidth, ie internally streaming from a server. 

In my mind wired is always best. I have a really good Mesh system in the house but I still prefer wired where possible. We have Hard flooring downstairs, and carpets upstairs. I used some 30m Flat cat 7 cables to run from the hall to the upstairs (hiding it behind the hard flooring edge batons, and then under the carpet upstairs. I put an 8 port Switch at the first port of call upstairs and then repeated flat cables into each bedroom from that point. My missues hates wire and she's never even seen them yet so it must work

Edit - For clarification, I went from the hall, up the stairs into the closest bedroom, with a 30 meter cat 7 cable. fitted an 8 port switch behind a wardrobe and then ran 2 more flat cables to the other bedrooms. Absolutely soild network for me. (edited)

The usual precautions when drilling - water pipes, electrics etc, hopefully your ceiling/floor isn't concrete either which makes it a tad more difficult to drill through. I'm guessing you don't want to tack the cable along the wall (or behind the skirting)? Or drill to an outside wall and feed the cable on the outside. Virgin Media did that for my initial cable install - however the recent work had them drill through the almost centre of my stone cladding on the front of my house!

I have solid walls in my house. It's not that hard to drill out. When we had full fibre installed I wanted rj45 wall sockets in 2 rooms upstairs so we went out under the floorboard downstairs where my router is and luckily there was an air brick so we have 2 cat6 cables coming out of that and one goes up under the roof tiles into a loft room. The other one we drilled a hole through a bedroom wall to the outside wall and passed the cable through using rods to connect it upto a socket.

Easier to invest money in a GOOD mesh wifi system. Honestly, the way things are going with mesh, for the majority of households, even the thought of running ethernet anywhere won't be worth the effort.

Depending on funds, I'd suggest the best of the best, get the Asus XT8. Buy once and all that...

Better to go from above down. Use gravity.

There will be a joist along edge on 2 sides of the room so best not run cable there.

Floor joist run other way to loft ceiling joists to work out which walls have joist at the edge, or lift carpet and look at floor board joists fixing screws.
Drill hole
Get long screwdriver and pushed through plasterboard below or drill up through having looked through floor hole to check all clear.

Push something through holes with string attached using gravity. Tie string to cable and pull through. Get small trunking from DIY down corner for cable

I would use a long screwdriver to make a hole up through the plasterboard ceiling as Wayners suggests. Don't inhale the dust, if there is any pre 1999 artex it will likely contain asbestos. A screwdriver won't damage any cables that might be resting on top the plasterboard, or puncture any pipes. Check where any pipes under the floor are run (water, gas and central heating) before drilling through floorboards.

If you have plaster coving you'll need to slot it with a stanley knife or a multitool. It's quite easy to make coving good with a plaster based filler afterwards. You'll also want to slot the skirting board as running a cable up in front would look horrid.

I've chased out lots of channels for cabling in our house, some by hand some with the help of a SDS drill fitted with a chisel, you can also get a double bladed wall chaser for the job. Worse job was making a deep, wide channel up the wall when I fitted a modern consumer unit, as I found engineering bricks and several spare concrete lintels had been used to construct the wall! Burying networking cable is easy compared to that.

Buy ethernet wall sockets and proper solid copper core cat5E or better network cable (avoid CCA and CCS) rather than using a long patch lead. (edited)

You need these. Turn mains sockets into ethernet ports
ebay.co.uk/itm…987

When I needed to run ethernet from one part of the house to another, I drilled through the double skinned external house wall, led the ethernet cable round the outside of the house then back in via a convenient fan duct hole. The 15m cable was literally £1 from the Pound Shop, not UV resistant yet has held up for 10 years. It doesn't bottleneck my 100 Mbps broadband.

Just a reminder, if you already have coax cabling done, you can use existing coax cables with Moca adapter and can get 1gbps speeds.