- Housing

Depends where you live in London cheapest areas are in East london Tower Hamlets etc

If you buy your own place then you will have to pay council tax also which can be spread out over 12 months. This tax is for general maintenance.

- Utilities (e.g. water, electricity, phone, etc.)

You can get Sky which will give you phone, internet and broadband for around 60 pounds

water and electricity/gas are charged quarterly and depends upon consumption

- Food and drink

Again depends where you shop Waitrose is a top end supermarket and Asda/Aldi/Lidl are cheaper options

Food can expect to cost around 100 pounds a week

- Transportation

Cars can cost average car around 7-9000 pounds
other realted costs are road tax, insurance & servicing

- Leisure

Again this can vary as there is so much to do in London. London Eye ticket cost 40 pounds, similar Madamme Taussauds 40 pounds. Going to the park nothing. National Museum free also so depends on you

- Others (e.g. clothes, home needs, etc.)

Again depends on you

Hope this helps