Our transfer agents are:
for the London listing:
Computershare Investor Services (Jersey) Ltd
Queensway House, Hilgrove Street
St Helier, Jersey JE1 1ES
or, for the LuSE listing:
Central Securities Depository (Zambia)
Lusaka Stock Exchange Limited
Exchange Building
Central Park
PO Box 34523 Lusaka, Zambia
You may get more details here. You may also contact them by submitting your query here.