Should i do non accredited degree?Watch
BCS Accreditation simply means that the content of the course you're studying on adheres to a set of standards laid out by the BCS (i.e. which topics are covered on the course, and how much depth on those topics - for example, ensuring that it includes a module on ethics and legal standards, as well as making sure it covers programming, and other core computer science topics). The accreditation itself is not an endorsement of you as a graduate (Except that it indicates you "should" be aware of things like GDPR and other issues, and that you've had the opportunity to learn about the 'core' Computer Science topics)
Generally speaking, as an IT professional you will always be expected to be aware of a range of issues surrounding IT - you don't need a rubber-stamped qualification to prove that, and anyone who employs you should be giving you training on topics like GDPR anyway for their own sake.
Unfortunately the bar for reaching BCS accreditation is fairly mediocre, so you can't even use it to judge whether a course is any good. It provides very little indication about the overall quality of the course, facilities or the faculty staff. It doesn't really give you any hint about whether the assignments and coursework are particularly challenging either.
Employers will always have their own way of assessing your suitability for a job; generally focused on your analytical, technical and problem solving skills. This can include technical tests, "whiteboard" problem solving, technical questions/discussion, being asked to present a project you've worked on (e.g. your FYP), or maybe sitting down with a laptop alongside the interviewer so they can observe how you approach a problem they've given you, and also discussing any previous experience (for example if you had a 12-month placement).
In terms of employability and your course, the focus should be on making sure you're learning things employers care about -- BCS accreditation unfortunately doesn't actually help with that.