Yes, both ATA and AFT are based at Coventry airport, and with similar acronyms! ATA (Aviation Training Associates) just teaches ATPL ground school; AFT (Atlantic Flight Training) teaches both ground school and a multitude of flight training.
I have no experience with AFT however I am a student at ATA, and have been impressed with the standard of training. ATA have experienced instructors who seem to have a good idea of what areas are important to know especially well for exam passing, with comprehensible methods of teaching.
By some freak of nature I managed to pass the first 7 with marks in the 90s for all exams thanks to ATA.
For what its worth, I would think that as with most things in life the cheapest isn’t always the best, just investigate any school fully before giving away your money, speak to ex-students, see how experienced the instructors are, visit the school and check-out what the results are like.
All the best,
Tom.
Atlantic Flight Training
Aviation Training Associates