You can print as many orders as you want during the day, but it's important to keep in mind to manifest before the courier comes to collect your shipments. It's not mandatory to file the manifests with all couriers, but it certainly helps you keep a track record in case you need to check your past manifests.
If you print any consignments to the current day's manifest, but they won't be collected yet, then you can defer those consignments from the current manifest and those will go into the next day's manifest. That way you can avoid canceling labels. A short guide for Royal Mail can be found from the link below as for that courier the manifest needs to be filed before every collection:
For some courier integrations like DPD UK you can change the Deferred Days value in Linnworks.net > Shipping > Integrations > Services > Edit screen to defer the date for the printed label as for that courier manfiesting is not mandatory. Please bear in mind to change it back when you should decide to modify the value.
I hope this was helpful to you.
is it possible to process further orders once the end of day has been run for shipping services?
I'm not trying to add to the existing day, more that i am trying to get ahead and start processing for tomorrow