Hi Mel
Bienvenue à Londres ! You see, I've reluctantly been forced to become somewhat more 'multicultural' since becoming part of the EEC……lol ! Incidentally, there are some pretty panoramic good views to be had from the walkway around the dome of St. Paul's Cathedral, but sadly this facility is not open at night-time and the trip is wholly dependent upon prevailing weather conditions ! Regrettably photography is not allowed inside the Cathedral itself, but I have included a link to an excellent 360º 'virtual' tour of the building, which requires a high-speed (< 2Mb) broadband connection. Click on the http link below and then on the small photo of the dome which appears (marked Click Here). There are a number of 'buttons' to choose from along the bottom of the main 'tour' page, so you'll need to select the one at the far right-hand side which says 'view from the top' which takes you to the exterior views. Clicking and dragging the mouse allows you to control the movement of the image. Shift zooms in and Ctrl zooms out.
St Paul's Cathedral
If you slip on a pair of comfortable shoes or trainers, you can obviously walk across many of London's bridges which offer some superb vantage points from which to take scenic photographs. The
infamous 'wobbly' Millenium Bridge which spans the river between Bankside (now Tate Modern Art Gallery, south of the Thames) and St. Paul's Cathedral (north of it) gives a fresh & dramatic perspective of London previously unavailable to pedestrians. The Houses of Parliament are perhaps best photographed from the south side of Westminster Bridge (from the pedestrianised Embankment). I am ashamed to admit that I have never been on the revolving 'London Eye' myself, but the views it offers are supposedly excellent. As for safety at night I'd say that London is a fairly safe city, so simply exercise caution as you would elsewhere and if travelling on the Underground, if possible choose a carriage where there are plenty of other people on it. I'm sure that if you asked nicely, one or two of your students would be prepared to accompany you on your night-time excursions. Lastly, don't forget to pack a decent tripod !
If you need any other advice, simply PM me and I'll enclose an e-mail address.
Best regards
Richard