yeah of course.. any heli can just land at will in a park in inner city london, have a smoke and wait for the weather to clear up.
And its attitudes like that are contributing factors towards accidents....the red-mist, press-on effect !
You made a bad call on the weather. Its closed in around you. You know you're about to hit an area of London that you would rather not be in under cover of cloud and potential ice.
Assuming you have exhausted all other viable options, don't press-on, put the damn thing down ..... I'm sure the CAA would much rather see you do that than end up hitting a crane.
Infact, didn't someone link to a AIC pink on the subject ? You might want to read it..... P146/2012 issued 20 December 2012.