Since you are also working I believe this MSc will be even more relevant to you, in fact about half if not more students are working and part-time/block mode and others have taken a break for a year just to do this MSc.
Security Management is not the same as CISSP because the module doesn't go into any technical detail it's just issues around managing the security of information in general. So it covers areas such as ISO27001 (a lot of importance is given to the ISO during the module), Risk Management-Assurance-Assessment-Analysis etc, Business Continuity and Disaster Recovery, Governance, Law and Standards in general around Infosec, and Audit but all of these are from a management perspective e.g. how do you perform information security risk assessment in an organisation. The exam is not scenario based it is essays. So 5 essays choose 3, each one is 33%. The essays are of the type: Why would a company that is ISO27001 compliant, seek certification, what is the difference, and why might certification not be suitable for all organisations. Then you write a 600-900 word essay for each question.
Actually CISSP would be very easy to get AFTER you finish the MSc because most of the areas are common with the MSc and you would need very little additional study. In fact there is a free 2-day training course in June for CISSP at the Uni for students of the infosec msc only. Then you can give the exam whenever you want. I have heard of students giving it already this year and one of them (that I know of) passed with little extra effort.
The smart cards module is good it has solid content and will always do because RHUL receives sponsorship from Orange and Visa for research on this field and there's also the SmartCard Centre research lab on campus as a result. There are also many projects that are given out on this subject so that you can help with the research, if you are into smart-cards you will have plenty to do you should contact Mr. Markantonakis when you start in September and he will give you more details.
I do not know much about database security but friends have said that the content is "not what they expected" but good stuff it starts with the very basics assuming no specific DBMS, just the theory around designing and implementing a secure database / DBMS such as serializability, deadlock detection etc.
Advanced cryptography is goog if you really like cryptography and you're good with maths. It goes into detail about how DES, AES, ElGamal, RSA and other algorithms work and things such as Differential Cryptanalysis, Discrete Logarithms etc. I have not personally taken it but not many people feel brave enough to I think there were around 8 people who took it this year but I would say go for it if you're into the subject.