Hi Sandy,
Article 17 of the UK / Hong Kong tax treaty here:
UK/HONG KONG DOUBLE TAXATION AGREEMENT AND PROTOCOL
Advises that pensions and social security pensions, arising in Hong Kong, from employment or self employment in Hong Kong and paid to a resident of the UK, are only taxable in Hong Kong.
As the pensions would not be taxable in the UK, there would be no tax implications from the transfer of the pensions into a UK bank account. If the pensions attract interest, whether in the UK or not, this is taxable in the UK.
See article 11 on interest.
Thank you.