GBP/USD technical analysis: Bears await a sustained break below weekly lows, around mid-1.2100s

• Brexit-related uncertainties continue to weigh on the British Pound.
• Weakness below weekly lows should pave way for further downside.

The GBP/USD pair this week's retracement slide from levels just above the 1.2300 round figure mark – a resistance marked by the top end of a short-term ascending trend-channel - and remained depressed for the third consecutive session on Friday.
 
Given the recent downfall, the mentioned channel constituted towards the formation of a bearish continuation – flag chart pattern – and point to persistent selling pressure, supporting prospects for a further near-term depreciating move.
 
With technical indicators on hourly/daily charts holding in the negative territory, sustained weakness below weekly lows – around the 1.2155 region – will reinforce the bearish outlook and set the stage for a slide back towards the 1.2100 handle.
 
A follow-through selling now seems to pave the way for a move towards challenging the key 1.20 psychological mark amid persistent Brexit-related uncertainties, with some intermediate support near mid-1.2000s.
 
On the upside, immediate resistance is pegged near the 1.2200-1.2210 region, which if cleared decisively might prompt some short-covering move and set the stage for a move towards reclaiming the 1.2300 round figure mark.

GBP/USD 4-hourly chart