Labor must be concerned by re forms progress in the polls but the nature of 2 party politics is changing so votes can also be lost to the greens and libdems. Traditionally parties have moved to the centre ground to pick up votes but with re form and the greens there are parties on hard right and left that can pick up votes from the disgruntled Labuor voters. Kemi cant stay silent for much longer because re form are mainly stealing voters from her party.
Starmmer should perhaps be bolder and move more to the left. Plenty of levelling up still to be done, and plenty of tax to be picked up from the non doms. And there is a precedent from the Don himself who announced taxing overseas Americans will be fully enforced. Finally a tariff free trade deal with the EU will boost the economy and confidence in the economy.