Designing for pick and place
Coming from a production facility I can say that we do not require a specific PCB design tool. We (and probably all the other manufacturers) have the tools to convert your files to our required formats.

We would ask you for either Gerber or ODB++ files plus a report (of whatever kind) of Components and Pick'n'Place coordinates (or coordinates just in general). Something like a spreadsheet or CSV with the following columns:

DESIGNATOR,CENTER-X-MM,CENTER-Y-MM,REF-X-MM,REF-Y-MM,ROTATION,PARTNUMBER
R417;63.8mm;19mm;63.8mm;19mm;270.00;WI1002-S17   


Usually you can simply hand over the data (which is output by DesignSpark or any other tool) and the production facility will take care of your PCB, stocking parts and production (+ what else is needed). 

Also, you might want to ask your production facility for a list of components they already have stocked or already available in their system. This has benefits for you and the production facility:


You can probably use parts which are stocked or used in large quantities already (cheaper)
If you use parts from the company, you can immediately assign their Article number so they won't have to look up the parts, thereby making the process shorter for the producer (and cheaper for you).