Improving network speed in homeoffice

[Squid Vicious]

I have a VirginMedia 200Mbps service and I'd appreciate recommendations on how to improve bandwidth upstairs in my man-den/homeoffice.

Unfortunately the homeoffice is at the furthest possible point from the access point downstairs (2 walls and a floor) so wireless performance is poor.

Test measurements:
- Superhub3 (downstairs) via ethernet on a laptop measured >200Mbps
- Superhub3 (downstairs) via wifi on a laptop (downstairs) measured approx 190Mbps
- Superhub3 (downstairs) via wifi on a laptop (homeoffice) measured approx 40Mbps
- Superhub3 via netgear powerline adapter to Switch to desktop (homeoffice) measured approx 50Mbps
- Superhub3 direct to Switch (homeoffice) measured >200Mbps

If I have a particularly large file to download upstairs I run a length of ethernet (15-20m) from the hub to the switch upstairs - it's a very temporary solution.

I think the netgear adaptors are the 500 model but maybe hindered by being on a different ring circuit - is it even worth considering alternative powerline adapters?

Are there any wireless solutions that would provide anything near the 200MBps service given the physical aspects of the setup?

Attached pic gives you an idea of the current setup.

 

[Squid Vicious]

Thanks for your replies. I figured cable would likely be best option for performance and reliability.

The house already has coax running into each of the rooms so I may see if I can follow same routes as that.

 

[Squid Vicious]

May be worth looking at MoCa if you have coax into both rooms, you can get an adapter that whilst won't give you gigabit over it, they should get you a 100Mb connection.
https://www.actiontec.com/moca/

Interesting - I'd looked for a solution that operated over coax but didn't find anything that offered these performance levels (the site suggests upto 1Gbps for the moca 2.0 network adaptor - subject to noise etc)