GSK falls on slashing annual vaccines forecast
Glencore rises after reiterating FY guidance
BAE Systems slips after fire at UK nuclear submarine yard
Budget at 1230 GMT
FTSE 100 down 0.5, FTSE 250 flat

Oct 30 Reuters The UK39;s benchmark FTSE 100 index fell on Wednesday, dragged by healthcare shares after GSK warned of lower annual vaccine sales, while investors awaited the current government39;s first budget that is expected to see biggest tax hikes in 30 years.

The bluechip FTSE 100 .FTSE, opens new tab slipped 0.5, as of 0850 GMT, while the midcap FTSE 250 .FTMC, opens new tab was flat.

All eyes will be on Britain39;s new Finance Minister Rachel Reeves, as she will announce what may be the biggest tax hikes in three decades in a bid to fix the country39;s sagging public services, alongside billions of pounds of extra borrowing to overhaul the economy.

The UK39;s benchmark 10year bond yield fell to 4.264 ahead of the budget presentation scheduled for 1230 GMT.

GSK GSK.L, opens new tab dropped 3.5, after the drugmaker warned that its vaccine sales would fall this year, after weakerthanexpected sales for its respiratory syncytial virus and shingles vaccines in the third quarter.

The drugmaker pushed the pharma and biotech sector .FTNMX201030, opens new tab 1 lower.

Beverages .FTNMX451010, opens new tab was the worst hit among sectors, down 1.5, with Diageo DGE.L, opens new tab falling 1.7.

Shares of the UKlisted spirits maker were pressured by a 16.5 slump in…