Also try a speed test at different times of the day. If evening speeds are the lower ones then it's a contention ratio problem (too many using the same exchange connection at the same time) then complain to the ISP. Same for weekends. If it's always that low then complain to your ISP, might be a fault at the exchange. One other thing to check is to dial 1471 on your 'phone and listen carefully at the background 'noise' to see if you hear interference when the automated voice is speaking. Assuming Orange supplies BB via BT line.
Hi Thanks all for ideas tried them all and no improvement. My son rang orange and they fitted a new modem the engineer said he couldn’t improve on the strength. The following day the engineer rang back made some alteration at there end and it shot to over 15GB. He was advised not to switch the modem off at any time even when going on holidays, also the more often he was online the higher amount of GB would be at his disposal.
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