Please do not mine with your laptop. It does not have good ventilation and you will end up causing more damage than its worth. It will likely earn you pennies a day and will never pay for itself. If you want to get into mining invest in some GPUs and build your own.
Thanks for the advice. What GPU's do you recommend, along with motherboard etc ? I see the 1080 is quite a popular choice, so assuming you just SLI 2 together with a bridge and go with that ?
You don't need to SLI. Just set up a few risers and plug in your cards and mine away. Recommendations depends on your budget. I personally like the 1070ti but there are other choices available if those are out of your price range.
A few different options are laid out in this guide.
https://theminerhub.com/mining/building-a-mining-rig-part-2-hardware/