Virtual Assistant in London < =1 day / week

I am seeking someone to help with administrative work for myself (travel, dealing with admin issues, etc.) and helping me co-ordinate four companies that I am working with in a principle role.

It can be done remotely, but I'd like the person to be somewhere in London to enable handing off of things to be posted / pick up of items, etc.

I will work the assignments based on the skill strength of the selected candidate, but key attributes would include:
- Travel booking: I am very good at this, and thus find it hard to hand it off - but I need to - so gotta be good at it :)
- Research capability: Business projects, personal projects; Web-savvy a true must
- Excel / numerate: Ability to sort through basic month-end receipts/bills/etc. and get to accts
- Languages a plus: French most useful - but not mandatory
- Patience: To deal with the likes of BT, etc. when I cannot
- Copywriting/creative a plus: Ability to help with web-related issues a plus

To start with, the role would be about half a day per week - but flexible hours - and if we are working well together that would ramp up to a full day.

We'd start with June and see how it's working.