Caleb,
You must understand that your compensation package (per visa sponsorship certification) will not support an acceptable lifestyle in central London for you.

You need to also understand that 40% tax rate is applicable nationwide in UK at £80k pa so unavoidable I'm afraid.

Which floor are you working on at Nations House?

You must inform your HR dept about London weighting for salary.

Are you able to help me with the points needed for intra-company transfer?
I really want to get my friend some work here.

According to the points based system he has an appropriate salary and he has shortage emplyment category etc.

I noticed your salary and compensation package is somewhat less than my friend that's why I ask.
Please inform me Caleb