Just to report back - my two grey Modalu bags arrived. Formerly known as Bristol, I see they have now renamed the style the Pippa (oh, well...). I ordered them not because I'm a slavish royal-watcher, but because I'd been looking for a nice grey bag with outside pockets and a detachable strap.
Anyway, am delighted with them. Ordered a medium and a small, and decided to keep the small in 'Shark':
www.modalu.com/product/bristol-small-grab-bag-1?colour=tan
because I wanted a reasonable-sized everyday bag, not a 'brief-case' type one to carry lots of papers, laptop, etc. If you did want that, the 'medium' (ie, the one originally pictured with Pippa) would be great - it has massess of compartments, pockets, etc yet looks elegant. Would be good for work. The small is not too small, though. It also has several pockets and plenty of room for a book.
Definitely going to keep my eye on this brand, as the prices, whilst not cheap, are not 'It' bag, or as high as most Russell and Bromley bags, but, on the evidence of this style, the design is good - stylish, not too bling, would go with casual and smart clothes - as is the quality.