Calling Taxus aficionados! Are these decent specimens to start a Yew hedge?

in Plants
Hi all, I saw these Taxus baccata at B&Q, quite tall (to about 80cm) and £8 each. That seemed good value to me (though I failed to clock the pot size for likely rootball size).
However these tall, relatively skinny offerings may not be the best bet. Hedging can be a funny thing - sometimes better to start smaller and pinch out etc.
They’d be for topiarised yew hedges in two 45cm high, 1.8m long troughs flanking a path to divide a garden. Reckon 3 or 4 plants in each for them to stitch together given time?
Any tips and feedback gratefully received.
Cheers, Johnny


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Advice is, therefore, to plant and leave to grow - maybe just giving the laterals a light trim if necessary. Only cut back the leader when the hedge is taller than the desired height.
I didn’t know that before. It’s contrary to the advice given for most other forms of hedging.
Hope that helps.
I wish B&Q labelled their plants precisely; I presume the Taxus pictured are English Yew, which is what I’m after, but the label left me none the wiser. They are a very bright green. Perhaps that’s their hue when young and they age to a mellow darker olive-ish green; or perhaps they’ve been fed with all sorts and face cold turkey in the real world.
This is a rare yew hedge near me; almost everyone else has privet.
Well, this is interesting. The Yew advice from the RHS contradicts the B&Q offerings on virtually every count:
Buy plants that are 45-60cm (18in-2ft) high, as these tend to establish more successfully and grow away better than larger plants. Bare-rooted or root-balled yews are preferable as they are usually cheaper than container-grown stock and seem to establish more readily.
https://www.rhs.org.uk/plants/popular/yew/growing-guide