Complex sentence: On 22 April 1486 Lord Lovell decided not to risk open rebellion and escaped to Burgundy; whilst the Stafford brothers had risen in rebellion in Worcester despite the fact that King Henry had mass support in that area.
Split into simpler sentences: On 22 April 1486 Lord Lovell decided not to risk open rebellion and escaped to Burgundy. In the meantime the Stafford brothers had risen in rebellion in Worcester, despite the fact that King Henry had mass support in that area.