Mr Berry, a teacher from Witney in Oxfordshire, and Mr Cash, of Whitechapel in London, were arrested in March 2023 as part of an investigation that involved counter-terror police.
They were accused of collecting pieces of information which were “calculated to be, might be, or were intended to be, directly or indirectly, useful to an enemy”.
They were charged under the Official Secrets Act a year later in April 2024.
Mr Cash was understood to have had access to several Conservative MPs, reportedly including former security minister Tom Tugendhat and then-foreign affairs committee chairwoman Alicia Kearns.
At the time of the charges, a Chinese embassy spokesperson said “the claim that China is suspected of ‘stealing British intelligence’ is completely fabricated”.
They urged the UK “to stop anti-China political manipulation and stop putting on such a self-staged political farce”.