Back OT.
Lets start with the basics first, rather than people calling out all sorts of shite without knowing the requirements. Sonys and Macbooks, I ask you!
I'm guessing this is primarily a business machine, mostly to run MS Office type apps, email and web. Not a consumer machine for playing games and watching films on.
Based on that, I would be looking towards an Ivy Bridge based i3 (Core i3-3xxx) or it (Core i5-3xxx). i7 overkill, and prone to reliability issues. If it brings it in budget, Sandy Bridge i3 (Core i3-2xxx) or i5 (Core i5-2xxx), the CPU itself isn't that different, but the graphics are down performancewise (compared to Ivy Bridge).
As hinted above, no discrete graphics, purely on reliability grounds. Use the Intel on CPU graphics. Battery gets a boost as a bonus.
RAM - 2-3Gb for 32bit Windows (can't use more than 3Gb anyway), 4+ for 64bit Windows. For the use I've assumed, no point going beyond 4Gb, it won't get used, and will zap the battery.
HDD - 1Tb? Have you been drinking? WTF for? If her work patterns need that amount of space (unlikely?), I'd be inclined to go with a smaller, faster drive (SSD, around 200Gb), and offline data to a cheap portable 2.5" external drive (2.5" so you don't need seperate power pack) - Windows (Business versions) can encrypt this, and the main drive, which I'm sure is a company requirement anyway?
Am I right in thinking she works from home a lot, but trundles into office fairly regularly? If so, portability is probably more important than a big, power sapping, hot screen? 'Elf and Safety will demand seperate monitors and keyboards - thats LAW! So you need a monitor port on laptop, and enough USB. Plus budget for a screen/keyboard/mouse.
On subject of budgets, Office is around £200 if you have to buy that out of the same budget.
In this case, I'd be looking at the more robust, servicable items from the likes of HP (Elitebook, Business etc, not Pavilion shite), Dell (Latitude) and Lenovo (Stinkpad) (despite my own personal objections to the Stinkpads). Not consumer oriented shite like Acer, ASUS, crApple, Tosh (as much as I love them), Sony, HP Pavilion and similar, and Dell Inspiron and similar. But you'll need to at least double your budget to just buy the base laptop, before SSDs, monitors, docks (if applicable), Office etc.
Are my assumptions correct, and am I near the mark?