UK Stocks-Factors to watch on Sept 20

Sept 20 (Reuters) - Britain's FTSE 100 index is seen opening up 1 point at 7,276.2 on Wednesday, according to financial bookmakers. * RYANAIR: Ryanair has offered senior pilots who agree to work an additional 10 days a bonus of up to 12,000 euros in a bid to avoid additional passenger disruption after it cancelled more than 2,000 flights over staffing issues. * TATA STEEL: Thyssenkrupp and Indian peer Tata Steel on Wednesday signed a memorandum of understanding (MoU) to comb