This is a pretty subjective question, so it's hard to answer.
If you're looking for something with a short half life zolpidem or zaleplon might be for you, those two aren't benzodiazepines, but so called z-drugs as the have the same mechanism of action as benzos, but differ in their structure.
But keep in mind that neither benzodiazepines nor z-drugs are for long term use.
Nitrazepam has a pretty long half life, but consider that another benzo may not work for you. Midazolam, triazolam and brotizolam are very short lasting, I would advice against triazolam, it should be off the market. Loprazolam, temazepam, lormetazepam, etizolam, lorazepam are all short-intermediate, I would consider these ones since nitrazepam works for you and if you go with a very short half life alternative, you may wake up during the night or even have rebound insomnia. Temazepam is somewhat heavy too, lorazepam is milder but effective. Lormetazopam, loprazolam and etizolam all have a half life roughly 6-10 hours, which makes them ideal, but I don't know what's available in the UK.
I'd also recomend into looking non-benzodiazepine alternatives, just because the dependance on hypnotic benzos is unmatched. In many Asian countries flunitrazepam, temazepam, nimetazepam, midazolam and triazolam can be as controled as opioids, and that's because of the rate of addiction they had over there where they were prescribed a little too freely. So, just be open is what I'm asking. Some antihistamines are very effective.
Because for an unacceptable porcentage of the population it causes withdrawal during the day, there are also cases in which replacement therapy fails and the patient suffers from seizures. Simply put, it's too potent and it's half-life is too short.Why do you think triazolam should be off market? It's by far the best insomnia med, especially great for shorter flights. Btw OP didn't say he was using regularly. I don't know why, but I never suffer withdrawal from benzos, though I am admittedly a freak of nature.
Why do you think triazolam should be off market? It's by far the best insomnia med, especially great for shorter flights. Btw OP didn't say he was using regularly. I don't know why, but I never suffer withdrawal from benzos, though I am admittedly a freak of nature.