You are obviously a canny shopper! As others have said, forget the apps and the gizmos.....IIRC, the Thoms are now AFE...scan the old forum threads and you'll see various alternatives.....Pooleys send out a super shiny annual catalogue in with Flyer mag full of wondrous gew-gaws to fritter the contents of your overweight wallet on....(or you could just visit their website) Likewise AFE and Harry Mendlesson-(spelling) other flight stores available, no personal experience. Iwould recommend you don't buy anything at all, unless you find something on Ebay (sometimes AFORS has stuff as well) and I'm pretty confident that you'll find the rest of the Thoms/AFE series on Amazon. With a bit of luck your chosen school will have the latest "air law" so, even if you get an old, secondhand one , you can cross-out obsolete bits and add notes of new/supercessions. These books are about £20 each....you'll likely absorb the info and rarely, if ever, read them again.....OK, in the big scheme it's only ~ £100 extra to buy new....but, add an 8.33hand-held transceiver radio and secondhand, you'll save probably another £100 (until last January, airband channels were 25 kHz spacing....steer clear!...If you then look at the nav- instruments and clipboard....you'll save another£50.........so, that's already 2 hours' free flying! A used "whizzwheel" will save another £20 -plus....a flight -bag? many students splash out on "all the gear"....then realise they had "no idea" and never will have, so sell off all their virtually unused "goodies"
Charts date, so , again , a castoff is fine for practising -on (and the area you use may well be up to date
although airfields do close and new controlled areas do emerge, hills, roads and rivers rarely do!
A handheld radio will help you listen in to the jargon and get a better understanding....licence is, IIRC £15 for 3 years, but you won't need it if the aeroplane already has a licensed set(and, until you have passed your FRTOL *, you can only transmit under your instructor's direction.
You do not need an operator's licence to own a set, but it needs a licence to be legal. you can get an airband receiver-only but it's of very limited use, you can always carry a tx/rx as a spare in case the fixed set goes on strike -indeed, that's where you'd probably get a second-hand one- from a retiring pilot! Again, school will provide a headset and eventually, you may buy your own....but do not buy in haste. After some experience you may decide you "must" have a £600 -noise-cancelling set.
*Flight Radio Telephone Operator's Licence . It's all a bit overwhelming at first, but in 6 month's time, you'll suddenly realise how familiar things have become!
Ebay hides "aircraft for sale" under "cars, motorcycles and other vehicles" which can be found on the dropdown "see all categories" menu---Lo and behold, first is "aircraft and Aviation." but aviation accessories or aircraft parts is a different area! also Airband radio can find stuff.
Can't remember if anybody has mentioned the LAA (formerly Popular Flying Association, now Light Aircraft Association) is what they do, and issue "Permit to fly"....grass-roots, home built and factory built where the manufacturer has gone and nobody supports it . all a lot cheaper and easier than a Certificate of Airworthiness issued by the CAA (and, yes, you can learn in a Permit aircraft and save a lot of money, provided you follow the right path! )
There's also the BMAA which, again , administer Microlights on authority of the CAA(possibly not a viable route if you plan on going commercial, but otherwise, quiteamazing what sleek, economical sophisticated "proper" aeroplanes come into that category!
sorry, long random post , hope it helps and keep fingers crossed for a good weather window!