Almost 100 jobs are at risk as the cash-strapped National Trust prepares to cull staff.The NTS said its future now depends on taking “radical action”.It will look to cut 92 posts in Ayrshire where top sites like Culzean, the Burns Museum and Brodick Castle Country Park are national hits.Across Scotland, the conservation charity has placed 429 staff at risk of redundancy.Bosses admit they face a grave outlook with cashflow virtually wiped out by the coronavirus lockdown.Income is predicted to drop £28m this year with investment losses of £46m.Chief executive Simon Skinner said: “The extreme and unprecedented public health emergency has put the charity’s future in doubt.“With some level of restrictions likely to apply post-lockdown and having