Institute of Fundraising director of policy and campaigns Louise Richards warned: 'What we need to keep pressing for is that the sector doesn't get forgotten in all this. We have concerns facing the current economic situation. Investment in fundraising - that is going to be put on the back burner until all this gets sorted out. That would be our real concern.'
She also called on charities to polish their public affairs skills to remind Parliament of the valuable role of the voluntary sector.
Richards said: 'We need to keep engaging with all parties at this stage. One third of all MPs are new, so it's really important that we make them aware of all the key issues.'
ACEVO head of policy Ralph Michell told Third Sector magazine that the hung parliament had been testing the lobbying skills of charity chief executives to the limit.
'It makes for an incredibly complicated world they will have to influence,' he said. 'We have been used to a strong and constant executive and a weak parliament. Now we have a more volatile political environment and there are a whole group of stakeholders that matter more than before.'
But Teenage Cancer Trust director of comms Catherine Cullen argued much of the public affairs work undertaken by the charity had taken place before the election, including letter-writing to MPs.