physically capable? Probably.... Mature enough not to wreck it in the first 2 weeks? Only you can decide that... I don't know much about the UK system/insurance and all that jazz, but what I can tell is that any person can ride any bike with the right mind set, and enough practice... It's all up to you really. Also, welcome to NN!
And how 'bout a pic of that RS50...
And how 'bout a pic of that RS50...