Now I don't know if my peers would call me a landscape photographer, but I use V100F for shooting flowers and details. It's very much a sensible version of V100 (it's not just the reds - the blues are quite psychedelic too). If you're learning the ropes, it's an easier film than V50 because it has a wider dynamic range and no reciprocity failure to speak of (in day to day occurences). I suspect that landscape photographers don't have much need to go to it, because V50 does such a good job in all the situations they are commonly faced with. I would argue that for close-ups where magnification leads to longer exposures, the lack of reciprocity failure is an advantage. I agree with all other comments above otherwise.
Apart from that, V100 and V100F are great films for architecture. V100F really works wonders on concrete and other surfaces with muted colours. V100 is good when you need to be aggressive with your colours: a building with primary colours or strongly contrasting colours, V100 will really scream (which is actually quite alright in drab weather). Might be useful to know as you are in London.
Joanna is a great fan of V100 but she doesn't know there is a world before 9am.

She'll tell you all about its benefits and her love of the UV filter.
Regards,
Charles