Questions about changing from Economics BSc to Computer Science MSc

I am halfway through my final year studying BSc Economics at Man Met.

Originally, my plan was to do a Masters in Finance ... but I've had a change of heart and I want to pursue Computer Science or a similar course at Masters level. I especially like the Web Development & Programming side of it.

a. Assuming its possible to make the switch, am I hindered by my current undergraduate course or will institutions look past that.

b. Do I need to prove an understanding of programming or some level of problem solving.

c. Am I simply unable to study at any prestigious university (e.g. KCL, UCL, ICL, Uni of Manchester) because I don't have an Bachelors in CompSci nor any work experience

Any advice/suggestions highly appreciated

I can't answer A for you. It's best to get a second opinion on this.

B would depend on the individual university and course (they usually expect you to have some programming knowledge for some computer science masters', but not necessarily at bachelor's level where they expect you to at most have A Level Maths). Some universities would accept relevant work experience in computing for X years being the equivalent of a bachelor's degree in computer science under accredited prior learning, but you would need to check out the individual universities and degree courses to be sure.

C. It depends on the individual degree and university that you want to apply to.
There are some master's degree courses that would require you to have done a bachelor's in computer science, but these degrees tend to be advanced and builds on the knowledge from the undergrad.
There are then some master's degree courses that work more like conversion courses for people who haven't done an undergrad in computer science. These include courses from UCL and Imperial. See:
https://www.imperial.ac.uk/study/courses/postgraduate-taught/computing/
https://www.ucl.ac.uk/prospective-students/graduate/taught-degrees/computer-science-msc#entry-requirements

In terms of the last part, are conversion courses worth less than the advanced masters courses?
If so, is there a further course that people usually go on to build on the conversion course.

I can't answer A for you. It's best to get a second opinion on this.

B would depend on the individual university and course (they usually expect you to have some programming knowledge for some computer science masters', but not necessarily at bachelor's level where they expect you to at most have A Level Maths). Some universities would accept relevant work experience in computing for X years being the equivalent of a bachelor's degree in computer science under accredited prior learning, but you would need to check out the individual universities and degree courses to be sure.

C. It depends on the individual degree and university that you want to apply to.
There are some master's degree courses that would require you to have done a bachelor's in computer science, but these degrees tend to be advanced and builds on the knowledge from the undergrad.
There are then some master's degree courses that work more like conversion courses for people who haven't done an undergrad in computer science. These include courses from UCL and Imperial. See:
https://www.imperial.ac.uk/study/courses/postgraduate-taught/computing/
https://www.ucl.ac.uk/prospective-students/graduate/taught-degrees/computer-science-msc#entry-requirements

Considering Masters application deadlines are coming up...

Are there short-term programmes to gain credited experience in the CompSci field such as online internships.
I know many programmes run over the summer, but I don't think I could include that in an application I'm completing next month.

Many thanks for the time you've put into these responses