The St Wulfram’s Save Our Spire campaign has reached its £600,000 target thanks to an anonymous donation made during a church service.
On Sunday a donor who wishes to remain anonymous handed their generous contribution of £1,000 to one of the church wardens, enabling the target figure to be reached following two years of fund-raising.
Appeal chairman Jean Parker said: “It is a relief and a great feeling to have got there after all the hard work over the past two years. To know that the spire is safe is wonderful.
“This donation was very generous and we would like to say thank you for the substantial sums that have been given and everyone who has helped in raising the amount.
“People in Grantham and those associated with the town really have given us enormous support.”
The funds have been raised to pay for the restoration work currently being carried out on the 86m spire.
Since February scaffolding has been in place to enable the removal and rebuilding of the damaged top 40ft, where corroded cast iron tiles are being replaced with stainless steel.
Mrs Parker added: “My sincere hope is that no-one, for at least the next 200 years, will see the spire, again, without its top!”