I'm not familiar with the UK wiring standards. However an easy first step that I would imagine also applies there is losing the bonding jumper between neutral and ground at the main circuit breaker panel.
In Canada and USA with our split phase residential system a decent next step is to overload 1 phase causing the neutral to start drifting from 0V.
In the UK with single phase supply I imagine the next best thing would be to also break the neutral return to the pole which should generate at least 100V on the neutral (and also stop all appliances from working), fortunately for you (I think) the UK mandates GFCIs (RCDs) on all residential circuits which would also prevent that from actually killing you.
In summary, I'm going to guess that touching neutral in the UK is a healthier past time then it is in the US or CA. Still not healthy, but at least healthier.
In Canada and USA with our split phase residential system a decent next step is to overload 1 phase causing the neutral to start drifting from 0V.
In the UK with single phase supply I imagine the next best thing would be to also break the neutral return to the pole which should generate at least 100V on the neutral (and also stop all appliances from working), fortunately for you (I think) the UK mandates GFCIs (RCDs) on all residential circuits which would also prevent that from actually killing you.
In summary, I'm going to guess that touching neutral in the UK is a healthier past time then it is in the US or CA. Still not healthy, but at least healthier.