See the data version history.
The data of old versions are not available at WDCGG.

Updated Date	Version * : the latest version	GAW ID	Station/Mobile	Gas Species † met : with meteorological data	Platform	Sampling Type	Buffer	Organization	Details
2023-07-19	0077-6019-3001-01-01-9999 -2023-06-30-1749*	TAC	Tacolneston Tall Tower	CO	surface	insitu	data1	UNIVBRIS (Atmospheric Chemistry Research Group School of Chemistry University of Bristol)	click
2022-07-27	0077-6019-3001-01-01-9999 -2022-06-30-1517	TAC	Tacolneston Tall Tower	CO	surface	insitu	data1	UNIVBRIS (Atmospheric Chemistry Research Group School of Chemistry University of Bristol)
2018-06-14	0077-6019-3001-01-01-9999 -2018-03-12-1002	TAC	Tacolneston Tall Tower	CO	surface	insitu	data1	UNIVBRIS (Atmospheric Chemistry Research Group School of Chemistry University of Bristol)