More than 700,000 voters will be moved to different federal seats in a sweeping plan that reshapes the political contests for independent MPs as well as Labor and the Liberals in key seats in Sydney.

The draft redistribution for NSW seats will not only abolish the seat of North Sydney, held by independent Kylea Tink, but also expand the neighbouring seat of Warringah, held by fellow “teal” independent Zali Steggall, into suburbs such as Cremorne and North Sydney.

The other “teal” electorate on the north side of the harbour, Mackellar on the northern beaches, held by Sophie Scamps, will also expand southwards into territory currently in Warringah, such as the areas around Brookvale.

The former Liberal seat of Bennelong, now held by Jerome Laxale for Labor, will expand eastward to take in some of the suburbs that were previously part of North Sydney, such as the suburb of Lane Cove.

The Liberal seats of Bradfield, one of the party’s strongholds over many years, will also expand its borders in ways that could reshape the contest at the coming election.

Now held by Liberal MP Paul Fletcher, a frontbencher and former cabinet minister, the seat is under challenge from independent campaigner Nicolette Boele, who received funding from Climate 200 at the last election.