SkyForce6

Perhaps the Timbuk2 Copilot can be something you are interesting in. No detachable laptop bag (but that is an extremely rare function in wheeled luggage almost none existing): https://www.timbuk2.com/products/544-copilot-luggage-roller?category=travel-bags&clickId=2734551120&utm_campaign=2-125194&utm_content=2734551120&utm_medium=affiliate &utm_source=21181&utm_term=56878X1338177Xba7331486 d68d0c4bec7623118586f57&variant=12733983064106

But it comes with a very convenient easy access top front pocket for your shoes and toiletries! And has a slim front pocket big enough to store a tablet. However one of the big star functions/selling point of this unusual bag is the easy access top panel compartment where you can store a separate laptop bag that you can take out when needed. Review video here (the compartment where you could store a laptop bag is shown 06.18 time mark:


Available from Amazon UK here: Notice though it is a surplus bag so this means you maybe not getting the lifetime warranty that Timbuk2 provides when you order from them directly. This is a bit over your budget but I could not find anything less then 150 that comes close to your demands.