My mate lives nearby in Oakham, so we regularly ride there in the evenings as a training ride. It’s quite splattery at the moment, so I recommend mud guards if you’ve got them, particularly if you are doing the peninsula because it’s quite sheep poo-ey there at the mo.
I think it’s quite a good night time blast, because you can really push round the loop; the peninsula is quite undulating, so you can get up quite a sweat if really pushing it.
Are you familiar with the loop? If not, there are a few points where it’s not massively obvious which way to go. Might be worth finding a GPX file?
I could probably send you something if you need it?