Top critical review
The usual limitations of this class of device.
6 November 2018
PlusNet dual band router, wired speed 36x9 Mbps wireless 26x9 Mbps using TPLINK AC1200 dual band booster:
It does what it's supposed to, just. Intrinsically wireless boosters are a poor solution to a range problem and this is no exception. And much worse if you are roaming round the place with mobile devices.
If your wireless router is cr.p (most provider wireless routers are cr.p) then so will be the booster performance. And if you are living in a typical urban flat, then the 2.4g spectrum will be overloaded and that's likely to be the limiting factor. And the 5g band is likely only to work in line of sight of the router or booster, so if you are going round a corner or wall or two you will be limited to the congested 2.4g band.
This solution just about gets a useful throughput to the destination I required (hop1 6m + 1 turn, hop 2 8m with 2m turn) at 5Mbps which is just about adequate to stream Youtube. GOK why I elected to get a dual band booster as it was never going to be serviceable at anything other the 2.4ghz band and with a maximum internet speed of 35Mbbs that band is more than adequate.
A decent single wireless access point (eg Ubiquiti UAP LR) replacing the wireless component of the router may have been a better solution, though positioning is key and difficult, and it's a lot more expensive and technical. Likewise a mesh wireless system. I may try using the TPLink booster in AP mode linked to the access point with power line adaptors.