Letting your main property due to moving abroad

[isee]

Hi,

I am just reading up on being a landlord as there is a high chance I will be emigrating (most likely temporarily), but do not want to sell my house in the UK.


I understand that there is a whole host of things to keep in mind, such as annual gas safety certificate, EPC, deposits and self-assessment returns (being taxed on income in the UK whilst living in Luxembourg is also something I would love answered by the way), but my main query is what to do with my residential mortgage.

As far as I understand, it is recommended to get a buy-to-let mortgage for my house, but I have an awesome rate and would rather leave things as is. Would I b breaking the actual law or exposing myself to some sort of penalties by doing so? What are my likely and worst scenarios if I just let my house and moved away?

Thanks for your help in advance.