Can I be fired without a reason during my probation period?

No, employers cannot summarily fire you during probation without a valid reason and a fair process.

Even during a statutory or contractual probation period, UK law requires employers to follow a "light touch" fair procedure. What makes the Workers of England Union unique is that we assign dedicated, external representatives who are completely independent of your company's workforce. Your employer cannot deny you your statutory right to be accompanied by a WEU official to ensure that performance or conduct allegations are thoroughly and fairly challenged.