Full house rewire - any tips?...

Yes, provide ethernet points in bedrooms if you're going to extend the media systems to them. Also provide ethernet sockets for the heavy users which should not be on WiFi - such as TV's themselves, gaming computers and a central comms location and maybe to a work-desk, then also put one or two sockets high-up for WiFi repeaters so that you can extend the WiFi into further part of the house - sufficient for at most two repeaters. Have power sockets along-side them too. That way all of the smaller IOT devices can be on the WiFi and be undisturbed by the high-bandwidth devices.

Consider running power and ethernet out to a potential EV charging point too - if you have your own driveway.

Will you be looking to install CCTV cams? If so, they are best off using PoE (power over ethernet), but wire them back to the central comms location and you can install a small PoE switch in that location for those devices when you need.

Go for a smart heating system such as the Drayton one. Other options are Shelly TRV's, but I haven't tested them yet.

Solar - leave room in the consumer unit for additional breakers (as well as for EV charging) and have space for an inverter too.

Get two way switches, for your bedroom lights, put in on either side of the bed. Get 5amp sockets for places where you want to have lamps.

For solar, as well as connections to the roof/attic, make sure you get it wired for a battery system, for future use.

As mentioned above, make sure your fuse board has room for expansion. Three rows at least.

Wire for CCTV, even if you don't plan on needing it now.

Power and data cable for EV charging.

Run co-ax from outside, to a central point inside, so suppliers don't have to drill into your house. Then wire from central point to where you want TV. I got lucky, and was able to wire three co-ax direct into the junction manhole in the street.

Here's mine, having gone through this back in Jan:

1. Personally, don't bother trying to get fancy in-built wall sockets - standards change, approaches change, and these date pretty heavily.
2. Similarly, don't bother wiring for sound in a living room - days of wired Home Theatre equipment feels fairly done.
3. Ethernet vs. mesh - I didn't get our place wired for ethernet because it's a 120 sqm semi-d with fairly thin brick internal walls, so instead went with coax to by tv, router -> switch with all the hard working devices (Playstation, home theater pc, etc.) directly connected, and then a mesh wifi network using 3 google nest wifi points. Works perfectly for 2 people working from home fulltime, plus heavy use of the devices above. That said, if the walls were thicker, or the house was bigger, I would have wired instead.
4. Overestimate on plug sockets - it'll never be cheaper / less hassle to put a socket in than now, and you'll never turn around and say "I wish I had 100 quid in my pocket rather than that extra plug".
5. Even if your oven is gas, IMO run an electrical spur for an electric oven. I'm debating changing, and regret not doing this.
6. bare minimum, get them to run a spur for an electric vehicle charging point, if you have parking. Maybe go full hog and get it installed, and get the SEAI grant. Again, a lot easier to do it now.
7. I regret not getting them to put a powerpoint out front as well - or again, at least a spur for bike shed (electric bike), front garden lighting, electric gate, etc.

Wiring for sound is really cheap. And if you don't have wired speakers, how are you going to charge wireless ones?

I ran speaker cables to a bunch of locations in my house, in the ceiling, and locations marked. But I just can't really see a system now where I'd use it. I've got an alexa in the bath room that works perfect for my needs.

I ran cables for 5.1 to ceiling points for the front and rear channels too, but only use the rear ceiling points at the moment. I don't think a sound bar could give me the sound quality that I want.

My electrician didn't run solar cables as specced for PV, so I've to do extra work now to upgrade that. I only have cables for a single string back to my inverter. It'll be a pain to run another string, and install the battery, but worth it when I get it done.

I told a mate what cables to get his electrician to install, and his roofer to install mounts, so this year he was able to put in PV with very little cost or disruption.

We have public on street parking, but I still ran a cable to our boundary, just so it's there if I need it in the future.

There's a device called Charge Arm, that swings out over a public footpath, from your property, that allows you to charge on street, without a trip hazard. I've seen them in a few places here in Dublin already.

Just get normal plug sockets. Putting stuff that wears out (USB chargers) or gets old (USB connection types, wifi noise-machines that really don't extend range at all) in to the fixed wiring is a surreal idea that has recently become popular.

I had a rewire earlier this year and went for ethernet + twin coax everywhere, power and ethernet (often required) for a car charger is in even though I don't have an electric car yet; and a spare lighting and socket circuit installed under the kitchen floor in the direction of where I'm considering an extension - very little added cost to avoid taking the floor up if we do; or I could bring them to a shed in future for not a lot of effort to retrieve them. I've suspended floors, though.

Hi OP Seeing that your house is over 120 years old, do you plan to have all new electrics installation surface mounted or concealed ?

Yeah but you are missing out on things like fast charging - in which case you're now going to use a plug instead of the inbuilt wall socket as well. As batteries get bigger / higher capacity, that inbuilt wall socket charger will be less and less useful due to time to charge.