The phrase "admittedly then" is correct and usable in written English.
It can be used to acknowledge a point or concession before moving on to another argument or statement.
Example: "Admittedly then, the project faced several challenges, but we managed to overcome them successfully."
Alternatives: "Granted then" or "It must be acknowledged then".
If you can put together a strong pitch, and if you're prepared to work expenses-only (a big if, admittedly), then you have every chance going for you.
If in the coming decades India can reform its governance — a big if, admittedly — then its model of democratic growth might ultimately prove more flexible, and therefore more resilient, than China's top-down, state-centric approach.
Yet even he could barely have anticipated that he would become leader of the party – admittedly then consisting of only 12 MPs – at the age of 37. Jo Grimond's abrupt retirement in January 1967, however, posed the party a problem.
No natural light, 34,000 birds in one shed, a tide of chicken wading around in its own shit (soaked up by the sawdust, admittedly), then sent to the gas chamber – more poultrycide than countryside.
Admittedly, they then lost heavily to Fiji at The Stoop.
With each new error, we build tools to remediate what we've done (though admittedly we then make more mistakes).
They're in total control here, without offering much up front admittedly, but then they don't need to.
Admittedly England then lost the final ODI in typically farcical style, throwing away an advantage to lose by five runs, thus suffering a 4-1 series defeat.
Admittedly, you then wouldn't be able to call yourself a journalist, but there's no money in proper print journalism these days anyway.
A ghost with a new hairdo, admittedly, but then anything's possible in Ramsay Street, a place where Daphne once gave birth with her tights on and Bouncer the dog got married in a dream.
What I have realised though, is that for all those negative experiences, there have been other times when patients have thanked me, made that joke in the early hours of a Sunday morning that lifted all our spirits, and even given me an Easter egg to say thank you (which admittedly, was then eaten at 4am).
