Best things to see in UK sky

Hi,

Does anybody have a list of the best things that can be seen with a
(cheap) 4.5 inch reflector in UK skies now.

We have seen the obvious (Saturn, Jupiter). Would like to see Messier
and other deep space nebulae, galaxies etc (have seen good M42). This
is mainly for my 9 year old son who wants to see impressive things (me
too !).

Yes, we are star hoppers. I have searched around a lot on the internet.
Those sites mostly give 'specials' around this month or are US based.

Regards