RE: Shanghai unveils measures to support private investment2 Jun 2023 14:09
If you have access to HK, you should be able to buy in multiples of 500, and fulfil orders much higher than 3000 in one go as they have a daily volume average of 2.5m compared to 100k on AIM.
Once you have converted ÂŁ to HK$ you can often keep a balance in HK$ for future use rather than have to convert it back to ÂŁ - but that depends on what your platform offers (II does, HL does not even offer access to HK).