Just rung off from the Gov. Gateway (un)help desk and the SA helpline - spent 45 mins on the 'phone!
Client receives income from an employment in the USA - put the data into the foreign section of HMRC's on-line filing, then enter theother UK income etc. Save the return and view the tax calculation : voila! No foreign income in the tax calcs!
I contacted the Gov. Gateway and they were able to re-create "my" problem, however their instruction is to contact the SA help desk, as this is a tax matter. The SA help desk advised me to send in a separate paper foreighn pages! So be warned - the foreign income for your clients may not show up either...! WATCH IT.