Hi Sheela
Sorry I just saw this thread and am replying. Am not sure if it is going to be of any use now but nevertheless....
I was in Lagos, Victoria Island in Nigeria for about 4 months last year on a project implementation. Lekki is nearby the place where I stayed and have visited the Lekki beaches few times.
I would say that VI in general is quite safe provided you take the following precautions
a. Never wander alone during odd hours (early morning < 8 or in the late evening > 7PM)
b. Ensure that you do not pick up any arguments with the locals.
c. Do not use the ATM during the odd hours and in secluded places.
d. Carry atleast 100 USD with you to be given to the attackers at any time.
e. In case you are way laid, please do not argue, just give them whatever u have (except ur dress) DO NOT i repeat DO NOT argue with them for anything. Just give them everything, tell them 'SORRY HOGA' (HOGA means brother) and turn back and walk away.
f. Try to avoid self driving and hire a local driver for going around.
g. Ensure that you rent a house in a safe compound. Here the entry and exit points are guarded and the whole colony is walled and have armed guards.
VI - LAGOS is relatively safer than the other parts LAGOS. Lekki is kind of ou

irts of VI. So, it is imperative that you take the maximum precaution.
I have tried to list down all the possible precautions. These were the ones that we took when I was there with my team. Thank god that my stay there went of without any incidents.
Do get in touch if you need any other information.