I just answered a similar question, which I will just copy here
The evalatuion criteria can be divided into hard and soft criteria, where hard criteria are e.g. grades, required languages, a minimum of work experience, and work permission and soft criteria relate to e.g. particular industries you have worked in, extra-curricular activities etc.
From the situation you describe, it seems very likely that you do not fulfill one or more of those hard criteria. Some advice on what this means for you:
- Grades: If your grades are not sufficient, top strategy consultancies will not invite you, however, smaller consultancies may do so. The grade aspect becomes a bit less relevant the more work experience you have. So you should definitely give it a shot again.
- Work experience: Top consultancies require you to have gathered relevant work experience (i.e. in consulting or in large and well-known corporates) - if you lack this experience, it may make sense to complete an internship in a smaller consultancy or in a corporate before applying to top strategy consultancies. You now gathered very relevant experience, so this should not be an issue.
- Language: Most offices require you to be fluent in the local language. So assuming you are fluent in English, this is less of an issue in the UK.
- Work permit: Do you have a work permit for the UK? If so, mention it on your CV. If not, this will be something that will prevent you from being invited. In this case, consider applying for other offices. You already did work in the UK, so I assume this is not an issue as well.
Additionally, you have "soft facts", which is everything from extracurricular activities to additional languages and interesting hobbies. Anything you can convince MBB with?
Anyways, if you still would like to work for MBB, you should give it a shot - however, if they now invite you (because it was the relevant work experience you lacked after graduation) you will probably have to go through the regular interview process again and you will be only offered a regular entry position.