Reply To: British Airways partial cancellation – rights?

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You can rebook the whole trip if you wish. BA is responsible to get you an alternative transport to Heathrow under article 9 of UK261 (right to care).

Reality is that they operate Pay and claim and often deny claims, so be prepared for that. Read other threads as this question has been answered.

You’re not due anything else as the cancellation is more than 14 days till departure.