Lighting trip will not go on after switching it off

[Aeros]

I switched my downstairs lighting circuit trip switch off/down and then tried to switch it back on again and it will not stay up/on.
I did not do any electrical worl and everything worked fine before,
Does this point to a faulty trip switch?
Thank you

 

[thomo27]

What is the make/model of the breaker ?

 

[securespark]

If you were not working on the circuit, why did you switch it off?

 

[ban-all-sheds]

There's a 0.67 probability that he is not in the UK.

 

[Aeros]

firstly, I am in uk, can,t explain why it also got posted on overseas site.
I switched it off to replace a light switch then realised it was a bit dark so changed my mind.
Now to answer the only valid reply, it's a hager,
Thanks

 

[PrenticeBoyofDerry]

Try isolating the whole installation via main isolation switch.
Then see if your MCB will reset in the closed position, when installation is off?

 

[333rocky333]

Some dont like being switched on under load, check all the light switches are in the actual off position first, more so if you have transformer run lamps

 

[holmslaw]

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