After applying I was contacted by the HR via email to schedule a phone screening. I informed them that I am NOT a British/EU citizen and would require Visa Sponsorship. I received an email assuring me that Sponsorship is available. After this confirmation I went through 2 rounds of Technical & Competency based interviews (during which I again brought up the topic of me requiring Visa Sponsorship) followed by an online test. After all this I was informed that I had been selected for the role, which I accepted, and I will be getting my paperwork the following week. When I tried to chase the paperwork, I was informed that they have to retract the offer as they never realised I require Visa Sponsorship and the original email chain was accidentally overlooked. They wasted 1 month of my time during which I had to travel to London twice and take time off work. I had handed over my notice to my current employer, and very embarrassingly had to ask them to ignore it. I find this behaviour extremely rude & disrespectful.