Both Plaid Cymru (Welsh nationalists) and the SNP (Scottish nationalists) hoped to do well from discontent with Labour in their traditionally Labour nations.
They haven't. Plaid Cymru's single seat won from Labour hides how the Conservatives have picked up several seats from Labour. The SNP has won none of its target seats.
They both campaigned on protecting their nations from austerity if they were needed to keep either major party in power. Perhaps Welsh and Scottish voters, both experiencing coalitions with the nationalist parties, aren't that enamoured about the prospect of that writ large!