How possible do you think it is for a student at one of the lower tier RG universities e.g. Sheffield/Liverpool/Newcastle, to get into Oxbridge to do a masters? Very Unlikely? What about a top 5 university like Warwick, Durham, UCL etc? And if a student from an ex-poly like Nottingham Trent applied to Oxbridge for a masters, would their application go straight in the bin?
Should you aim to do a masters at a university that is couple of places in the league table above / below your undergraduate university to increase your chances of success?