Whilst I can't give you an answer as I don't own a planer thicknesser,
I can try and get you an answer easier, as you haven't specified if you intend for this
machine to be used in a home shop by yourself, or if you have employees working for you/sharing a place in a business that may be subject to H&S inspection.
Say it is going to be a home machine, since you said single phase.
Is weight a problem, even the smaller ones look pretty heavy,
Do you have a 16a blue plug for powering it, or 13a plug?
Would you be willing to put a little work into it?
Is it capacity you are looking for, or a brute workhorse for heavy work?
A three phase machine would probably be half the price, so you would only need to hook up a 100 quid VFD (easy as wiring a plug,) and you could use it with a 13a plug then, or 16a if you prefer either,
if you have the choice.
Most if not all new motors on woodworking tools can run on 240 volts (three phase 240V)
If you see 240v on the motor nameplate, you can rest assured there will be no headaches,
and you can get that machine if its for a bargain.
If your looking to do heavy work with it, it may be a better option to go with an inverter/vfd
like Invertec, a UK manufacturer of VFD's, cause if it sh**s the bed, you will have support.
It would cost three or four times the price of the cheaper VFD's like the Huanyang 100 quid ones though.
I have two Chinese VFD's, one on the 12" startrite tablesaw, and another on the 24" bandsaw,
working off a 13a plug.
I will without doubt get another if a machine comes my way for cheap.
Tom