I have seen a previous batch of scroll saws for sale in our Lidl here (Switzerland) and assume those coming on sale in Lidl UK will be the same.
Those I saw are pretty much the same as other "Chinesium" machines available all over the place with only minor differences (name badge, colour, etc).
As such they're "OK" in that they will do the job (unless faulty, with problems such as warped arms), but tend to lack the refinements of better machines. Typically, the prices of these "entry level" machines seems to be about 100 to 150 quid in UK - I can't remember the UK£ equivalent of the last Lidl machines I saw here, but knowing Lidl, they will probably be less than that - AND you have the advantage of the Lidl no quibble 3 year guarantee if you get a faulty one.
HOWEVER, if you look at the first thread in this Scrolling Section you'll see a very good appraisal of the differences between these low cost machines generally, and the better machines (that cost more of course).
In short, as above, these low cost machines, will, as above, do the basic job, but if you're looking to be getting into scrolling on a regular basis, rather than just using a scroll saw now and then, you'll soon get fed up with the shortcomings of these basic machines.
In other words, "you pays yer money and takes yer choice".
Edit for P.S. The thread referred to above is (at present) just above this one - "Choosing a Scroll Saw. Why Pay More"? A quick read of that (excellent) thread will tell you much more. I suggest anyone considering the new Lidl machines read that first before deciding.
HTH