If you like the look of the Mazda then go for that. The MOT is about the expire, ensure a fresh one is issued as part of the deal (the advert says 12 months). A number of the previous MOT faults have been down to lack of attention - worn tyres, wipers, brake pads. A MOT failure that is fixed is no concern, however an advisory this year might be a failure next so the worn suspension joint could need fixing but it won't be expensive.

Re the Sandero, it failed the MOT because of the emissions, presumably because of the exhaust leak. But having had a look at the MOT history I am left a bit confused by the fact that the failure was 2nd September, but the current MOT is valid till 16th October?. I think you'd have to talk to the seller about what that is all about. Bottom line though is that an exhaust repair or replacement is not likely to be a big or expensive job.

Re the Corsa, nothing particularly serious on the fail, just brake adjustment. But it may need a set of tyres in the near future, if you really like the car otherwise, may be a haggling point.

Re the Mazda, doesn't seem to be anything serious either. The fail in 2020 was just a suspension consumable, they have a finite life, it is just a case of replacing it. The current advisory is for 'slight play'. Given that it would (presumably) be getting a new MOT upon sale, I wouldn't worry too much about that. If it passes again, then the play still isn't too bad. Plus, I wouldn't expect this to be a big or expensive job if it did have to be replaced on its next MOT. As for the tyre, difficult without seeing the cut, but worst case scenario would be having to replace two front tyres (not advisable to replace one, unless the existing one is nearly new and in that case, get the same make/model of tyre).

Re your Jazz, MOT history looks all good, nothing at all to worry about.

Which is best is more down to your needs and preferences. None are unreliable (the Sandero is also available with a 0.9 turbo which is more powerful than the n/a 1.2, but apparently this is a bit fragile, the 1.2 is fine), but the Mazda and Honda are more reliable.

The Sandero is a basic no nonsense workhorse, it will do the job but nothing more. It is a car for someone who just wants transport, and of course it is the youngest (which matters to some).

The Jazz is the most practical choice, with the most interior space and thanks to the ingenious design of the rear seats (the base flips with the backrest in place, like a cinema seat, so you can have two separate load areas). Very reliable, but (from what I have read) not much fun to drive. Maybe a bit like the Sandero but with added practicality and a more desirable badge(?), ultimately more reliable too.

Corsa's are ten a penny, but in the bright yellow with alloy wheels, it really pops. Like the Sandero, not quite as reliable as the Jazz or Mazda 2, but by no means unreliable. Not as spacious as the Jazz and Sandero, but should be OK for your needs. Ok to drive, but not especially entertaining.

The Mazda is going to be the best driving and most fun car here, but also with probably the least space. Not that it is very cramped, just less space than the others. But it is also likely to be the most reliable of them along with the Jazz.