Some info for anyone taking RT PCR test at Manchester UK airport or the airport station, both testing stations will print a hard copy of the test result for you, after you receive the result by email.
Alternatively there are mobile printing facilities near TI
TLDR : Answer Summary
At Manchester UK airport, you can take an RT PCR test at designated testing stations, which will provide a hard copy of your results after you receive them via email. There are mobile printing facilities available as well. Test results can typically be received within 1-3 hours, and the cost is approximately £90. Booking a test on the same day as your flight is possible.